Trying to get info on my mandolins

[Makophin]

Well, not exactly, Jerry.
You don't have the snazzy stairstep fretboard extension

You've got some pretty dang cool ones, though.

Oooh - I missed that! Pretty nifty! (When I first saw your response, I had a "trifocal error" and thought you said "Starship" extension - I was looking for the USS Enterprise )