Just noticed this Flip sight on Epay with the left base marked with a square/block "S" and the right base marked with a large "Q".
Anyone seen anything like this before?

Regards
Charlie-painter777

Click the arrow to see all 4 pictures,

WW2 M1 CARBINE REAR FLIP SIGHT TYPE 1 MARKED Q QUALITY? - eBay (item 170315713106 end time Apr-01-09 20:36:17 PDT)
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