Win 21 parts

[Bobby Cash]

https://i.imgur.com/V1bXaPK.jpg

There are numbers stamped on the inside face of the ejectors.
Almost impossible to read but I'm fairly certain they are not the serial number.
Any ideas?

[Frank Srebro]

Why not take out the retaining screw, remove the ejectors and look directly at the numbers or glyphs?

[Randy G Roberts]

Might be able to decipher them with a dental mirror, possibly.

[Bill Murphy]

I need a 21 ejector forend metal and/or wood. Thanks.

[Bobby Cash]

I was not so curious as to what actual numbers appear but why they weren't serialized to a gun. Thus far I've heard two plausible explanations.
1) Left and right extractors were produced as a set, and numbered so, then thrown in a bin well before they were fitted to a barrel yet now (then) existed as a set.
2) Left and right extractors were fitted to a barrel and assigned the same production number as say the barrel before the barrel was fitted and then serialized to a specific receiver.