April 15, 2005
Your options are a Lyman No. 57A or a Redfield No. 70CW. Winchester installed the Lyman sight when so ordered. My research survey for the Model 43 indicates that just slightly more than 3% of the Model 43 rifles were equipped with the Lyman No. 57A receiver peep sight.
My suggestion is to search ebay for both the Lyman & Redfield sights. One will eventually show up for sale, but be prepared to pay a fair amount of $$$ for it.
WACA 6571L, Historian & Board of Director Member