Hello Gang, after a lot research and knowing there is no good 5 digit GMT 16710, I started a new Project. The BP Explorer had a good Midcase, also the BP 1675 is a good Base for it. But we need also a gen Spec Bezel System for GMT. So I took a Explorer Midcase, reworked the CG's a bit to look like Gen. The Case takes a gen Crystal with no problem too I ordered a gen Spec Bezel System ( Retainer, Washer, Klickwire and Bezel) So this is how it works Installed Glas and Retainer Installed Bezel Self-made Klickwire Dial, Hands and movement is a cheap BP 3804 for the moment. ...and here " the first BP gen Spec 5 digit GMT Master 16710" [emoji23]