Used my 70s zinc-head Tech for the first time this morning, and it did very well indeed!! So that set me to looking at other Techs. One I saw is gold toned with a "fat" handle. But it appears from photos to have no logo on the top of the head. And there doesn't look to be a date code. If it doesn't have a logo, when might that one have been made? And for future reference, can one date Techs from if they have a logo and what type of logo they have? I checked Mr Razor, and can't see that kind of differentiation. Thanks, John