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Winchester M-1866 and M-1873
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Bert H.
Kingston, WA
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September 15, 2026 - 4:25 pm
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Bob,

Is this progressive change to the bolt associated with the addition of the “A” and “B” serial number suffix?

Bert

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Anthony #5411
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September 15, 2026 - 4:45 pm
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1873man said
I have narrowed it down to 28,000 to 31,000. The problem without looking at the guns themselves is most online photos don’t show the bolt face when selling a gun.
Bob
  

Bob,

That’s pretty significant, in all reality. I agree, as it’s pretty hard to determine from most of the pictures we see!

Bert H. said
Bob,
Is this progressive change to the bolt associated with the addition of the “A” and “B” serial number suffix?
Bert

Bert,

From Gordon’s book, that most of us refer to unless Bob has found out different through his works and surveys,  he states that around serial number, 79,000-182,000, we can see an, “A”, follow, and around 179,000, and up, a “B”, will follow.

Tony

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1873man
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September 15, 2026 - 10:39 pm
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Bert H. said
Bob,
Is this progressive change to the bolt associated with the addition of the “A” and “B” serial number suffix?
Bert
  

The change happened before the A showed up.

Bob

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Researching the Winchester 1873's

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Anthony #5411
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September 16, 2026 - 1:20 pm
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1873man said

Bert H. said
Bob,
Is this progressive change to the bolt associated with the addition of the “A” and “B” serial number suffix?
Bert
  

The change happened before the A showed up.
Bob
  

Bob,

Do we know the said significance of the, “A”, and, “B”? From all I’ve ever seen or read, I haven’t seen anything indicating any mechanism changes that I’m aware of. Or any other change that signifies these letters, as a reference to other models.

It surely doesn’t coincide with this bolt bushing we’re talking about.

Tony

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1873man
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September 16, 2026 - 1:48 pm
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Tony,

That is one of the items I have been working on.

Bob

WACA Life Member---
NRA Life Member----
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Researching the Winchester 1873's

73_86cutaway.jpg

Email: [email protected]

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Anthony #5411
Ohio
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September 16, 2026 - 5:07 pm
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1873man said
Tony,
That is one of the items I have been working on.
Bob
  

Bob,

Let me know if I can be of any assistance, as I know it’s from afar, but that would be some accomplishment, as the suffix letters, sure indicate changes on other models, as we’ve been made aware of by other members, here over the years.

Especially with the two letters overlapping serial numbers, which might just be something, that in itself is interesting! IMO!

Tony

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