Singer made No. 4 milled rear sights

[Lance]

Winter boredom has caused me to wonder if anyone out there has seen a SM42 marked milled rear sight. I know Singer made the "L" rear sight from 1942 on (if someone has a '41 dated "L" flip sight I would love to see it).

I have only seen one SM43 dated rear sight, the one I have, but I was wondering if anyone has a SM42. Attached is a pic of the Singer stampings that I have come across SM41, SM43, N67 (small font), N67 (large font)

Lance

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