Doing a bit of research into my Dad's watch, he bought it in 1971 and it sat in a drawer for decades. I recently had it fully serviced by Heuer's vintage division ($ouch), trying to figure out as much about it as I can. It's a pre-Viceroy (S/N 2228XX) and has the non-Tach bezel, but it has a lot of the Viceroy details (same hands, same 1-12 sub dial). I have the original sales brochure and the manual, it was purchased in a Nassau duty free store while my dad was on holiday there. Anyone know anything further about this particular model?