I know little about markings but if I'm not mistaken the L type sights are 3 and 6 hundred meters rather than 2 and 6.
I haven't researched them enough to know what years the savages were manufactured but it may be possible that yours was made after the US entered the war and was no longer hiding behind the land lease act.
ignore my complete lack of capitalization. I still have no problem correcting your grammar.
I never said half the crap people said I did-Albert Einstein
You can't believe everything you read on the internet-Benjamin Franklin
Bean counters told me I couldn't fire a man for being in a wheelchair, did it anyway. Ramps are expensive.-Cave Johnson.