Hey Bill,
No etching, just the 2 pictured stickers.
Just noticed the sticker says M60 and a letter was
blackened out after the 0.
Never noticed that before until I took these pics.
Maybe it was something Gene did before he started engraving
because the blackened letter looks like an F.
The patina on the brass makes me think it was an early module.
But it definitely is an M60 because it's visibly brighter than my
M60L.
Lens is scratch free.
Hope this helps