Is there any special meaning to the presence of black lacker over the name of an old manual lens? I have a Super Takumar 50mm F1.4 and a Soligor 135mm F2.5, both of which are M42 screw mount lenses. I bought them both from the same gentleman, who bought them brand new back in 1968. Both of them have the lens name (but only the name) inside the filter threads blacked out with lacker:
In both those pictures, it should say "Super Takumar" or "Soligor" on the top left, but there's black lacker covering up the white lettering.
I was wondering if this was just a quirk that this guy had (marking all his lenses), or if it means something like they were refurbished at some point.