Hi,

I have in regular use:

1-Redfield Bear Cub 4x32 26 mm one piece tube (a Kollmorgen, really...)from the Sixties. I changed the thin cross hair reticle for a N 4 German. The BEST optics in a 4x scope I ever seen. Period!!!
2-Redfield Bear Cub 4x32 1' tube from the Seventies. The Denver Refields. Duplex original reticle. Great scope, also!
This periods Redfields are, IMO, among the best fixed scopes made in USA.
3-Zeiss Diatal DA 4x32 from 1973. Reticle N 1 German, non centered reticle. I bought it new. 26 mm tube. A great scope!!!
4-Zeiss Diatal ZA *T 4x32 from the Eighties. Reticle N 4 German, centered. IMO THE BEST ZEISS SERIE SCOPES EVER MADE.

All of these work perfect in every way.