What is the difference between a Valjoux 7736 and a Valjoux 72?

[gplracer]

Is the size of the movement and layout of the sub dials different?

[slickdick]

Valjoux 22

Features

manual-wind chronograph, 60s, 30/45min, pillar wheel

sub second

Data

14''', Dm= 31.3mm, H= 6.4mm

17 jewels

f = 18000 A/h

power reserve 40h

Valjoux 7736

Features

manual-wind chronograph, 60s, 30min, 12h, cam switched

sub second

Data

14''', Dm= 31.05mm, H= 7.4mm

17 jewels

f = 18000 A/h

power reserve 45h

With one pillar the other cam, they seem fundamentally different.

Source: http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk

[alligoat]

Actually the V 72 is 13 ligne, so it's apparently smaller than the 7736 which is 14. The V71 was also 14 ligne.

Don't know about subdial spacing.

[Ephry73]

I hate to revive this post, but if one uses a 7750 DW case, then a 7736 could potentially fit except for the added width. Has anyone milled the inside of the case and case back to fit the wider 7736 onto a DW case?

[lhooq]

I get the feeling that if you trimmed the 7736's plates and bridges until they were as thin as wafers, and carved out the insides of a Daytona case until it was like a stainless steel eggshell, you STILL wouldn't be able to fit one in the other!

Subdial spacing should be identical between the V23/72 and the 7733 family, at ~7.8mm from canon pinion center to subdial center.

[Ephry73]

I was thinking of using a 7750 DW case for this. The 7760 has almost the same height as the 7736 from what I read. would be interesting. Specially if gen dials configuration can be maintained. Right now waiting on DWs 7750 movement and seriously thinking about the mystery movement to check it out.

E