Omega 2808 advice...

Posts
1,107
Likes
1,655
Sub-dial with graduated minute markers on the outer track?
 
Posts
10,446
Likes
16,336
How goes the saying? A photo or it did not happen...

Here is a CK 2181 out of my collection with original dial which shows the 1/5th-second-track:



It is a large watch at 37,5 mm with a cal 30 T2 inside (unfortunately still with a wrong replacement crown...)

I think it was only a matter of design to print this additional second track

enjoy

Mad! The 30mm watches really do represent a very deep rabbit hole.