I'm assuming you are looking at a single capital "G" stamped into the striker slot in the top of the tang?  If so, it's a machinist stamp.  These were commonplace (but not universal) from about S/N 8000 (1937) through the mid-1950s. 

They are not all "G" and have nothing to do with the G-prefix serial numbers on post-1968 rifles.  Stamps include the single letters J, U, F, G, O, and the numeral 4.  Does it look like these?  The one on the left is a Rockwell Hardness test dot found in the same location on some pre-war receivers, mostly below s/n 5000.

Hope this helps,

Lou

twobit said
Good morning from Texas,
The checkering is definitely not factory original.  I do not follow the Swiss/European market closely at all but have a little experience with it.  The conversion from Swiss Franc to US is a reasonable price for the rifle.  What is the full serial number of the gun?  I can not quite make it out in the image.
Michael
  

Thank you Michael,

I asked for the full serial number and let you know. I put down a reservation on the rifle and will get the necessary permit (and some cash 😉

I have a 1906 Winchester in .22 short from the same collector, so it will get a cool set…

Best, Thomas

Anthony said
Goatkeeper,
I think you're doing good with you're pictures, and would like to see more, including the barrel address, and the serial number, and more detailed pics, and close ups.
The pitting on the Magazine tube looks to almost be pretty common, from these older firearms, and the split in the tube shows how it was made, although the seam was more commonly against the barrel, on some models, concealing it. Better pics could help us see this better. Especially, closer pics of the barrel, at the forearm wood, below the rear sight, where you show something on the barrel, as far as pitting or older cleaned up pits and/or markings on the side of the barrel.
Note that the wood, shows a straight stocked, checkered Walnut, "Deluxe Style", (Collector term), checkered stock.  A letter confirming this configuration, and the members here, (twobit/Michael), who are currently surveying this model, can add a lot more factory records information, verifying what you have, and they're opinions, as they won't steer you wrong.
I don't think you could go wrong, at those numbers you posted, as from what I can see and tell, the carbine looks to be a good honest, src, and those were definitely used as tools, of the time. If it we're me, and the barrel length measurements are correct, (I'm assuming 20 inches),  and a closer inspection  proved to be accurate, it would be a nice src to add. The pics certainly don't look to be a cut barrel. It wouldn't stop me from going after this piece at those numbers, as I like it! IMHO!
I would much rather see a Winchester like this, as many other would, than it or another one being cleaned up, and being refinished, or mi-represented. 
Thanks for Sharing!
Anthony
  

Thank you Anthony,

I placed my reservation, and waiting for the permit (and save some money 😉

this "G" is not added to the serial number as a prefix, it is a clear marking on the flat bottom of the rear of the receiver where the bolt is inserted, and just forward of the rear action screw cap.  

I've failed to understand the procedure required to upload a photo of this marking into this post.

The checkering is definitely not factory original.  I do not follow the Swiss/European market closely at all but have a little experience with it.  The conversion from Swiss Franc to US is a reasonable price for the rifle.  What is the full serial number of the gun?  I can not quite make it out in the image.

Michael

I think you're doing good with you're pictures, and would like to see more, including the barrel address, and the serial number, and more detailed pics, and close ups.

The pitting on the Magazine tube looks to almost be pretty common, from these older firearms, and the split in the tube shows how it was made, although the seam was more commonly against the barrel, on some models, concealing it. Better pics could help us see this better. Especially, closer pics of the barrel, at the forearm wood, below the rear sight, where you show something on the barrel, as far as pitting or older cleaned up pits and/or markings on the side of the barrel.

Note that the wood, shows a straight stocked, checkered Walnut, "Deluxe Style", (Collector term), checkered stock.  A letter confirming this configuration, and the members here, (twobit/Michael), who are currently surveying this model, can add a lot more factory records information, verifying what you have, and they're opinions, as they won't steer you wrong.

I don't think you could go wrong, at those numbers you posted, as from what I can see and tell, the carbine looks to be a good honest, src, and those were definitely used as tools, of the time. If it we're me, and the barrel length measurements are correct, (I'm assuming 20 inches),  and a closer inspection  proved to be accurate, it would be a nice src to add. The pics certainly don't look to be a cut barrel. It wouldn't stop me from going after this piece at those numbers, as I like it! IMHO!

I would much rather see a Winchester like this, as many other would, than it or another one being cleaned up, and being refinished, or mi-represented. 

Thanks for Sharing!

Anthony

I have the possibility to buy a 1892 Winchester in .44 WCF, dated 1906.

Priced at 700 CHF, which ist around 900 USD

I added the pics I got. 

the only concern is the front of the mag tube, otherwise I would go for it. 
I bought by the seller before and trust him, when he says it operates smoothly and reliable with current ammo.

Any tips, suggestions?

Thank you all!

Aleck said

Bert H. said
I can see a slight rub mark (wear) on the top of the barrel halfway between the dovetail and the frame ring.  The rear sight was apparently removed fairly early in the Carbines lifetime.  If the gun were mine, I would find a No. 34C 3-leaf express sight to put back in the empty slot.
Bert
  

Thanks. I'm on the hunt for one!
  

Get in touch with Ben Tolson (here on the WACA forums), he is our resident sight hound.

Bert H. said
I can see a slight rub mark (wear) on the top of the barrel halfway between the dovetail and the frame ring.  The rear sight was apparently removed fairly early in the Carbines lifetime.  If the gun were mine, I would find a No. 34C 3-leaf express sight to put back in the empty slot.
Bert
  

Thanks. I'm on the hunt for one!

Bert

Bert H. said

rogertherelic said
There seems to be no signs the carbine ever had a barrel sight installed.  Is that a possiblity?   RDB
  

Yes, but Winchester would have put a blank piece in the dovetail slot versus leaving it empty.
Bert
  

Thanks Roger and Bert. I, too, was wondering about the rear sight.

FWIW, here are a couple of higher resolution photos.

Bob

I could not find the pic of the fired and bulged Henry cases that we talked about some time in the past.  When I showed the pic to Lou Behling he said it was a common occurrence. 

But here are some pics showing the bolt face of an unmodified rim fire and a modified to center fire. 

On the top is an original 66 RF bolt face.  See how it is flush.  The second pic show the conversion to center fire.  NOTICE that the bold face is raised to alleviate the excessive head space.   

ken1989 said
I have a few extra light weights in my collection.
The stock does have large hole as do my other extra light weights
Front sight is soldered onto barrel.
Does not have a nickel steel (smokeless) barrel.
Need to figure out how to post photos here, probably need a subscription.
  

If you send the pictures to me in an email, I will post them for you.

Bert - Win1885@msn.com