Welcome to the forum , beckyvs ( & thanks for posting images ) .
I'm curious about what you see in these frames that lead you to believe that they're hand-engraved ?
Are you seeing progressive chisel marks , etc. ( I can't tell from images ) .
Although my first impression is that these are die-cast items , I've been wrong before .
It's not so unusual for 'imperfections' to be manufactured into dies used for the purpose of simulating hand-made items .
One semi-tell-tale way to check is to inspect the numbers you mentioned & see if they've been stamped into the metal , or have been cast into it ( magnifyer will help ) .
Bottom line - if ya like 'em , use 'em !