Remington Model 1889 ID problem

[wileybelch]

My Remington Model 1889 10 gauge SxS has the firing pin retaining screws entering the receiver from the 6 o'clock direction. Every photo I have seen of the Model 1889 has the retaining screws entering the receiver from either the 3 or 9 o'clock direction (right or left barrel)! What variant do I have?

 

[zippy13]

Try cross-posting to Harley Nolden's Institute for Firearms Research.