Original Dauphine hand length for Omega ref. 2830-7 SC, Cal. 420 (1957)

Hello everyone,

I'm restoring my grandfather's Omega Seamaster ref. 2830-7 SC, Cal. 420, serial 15975463 (1957). The hands were replaced at some point and I'm sourcing NOS Dauphine gold hands to restore it to original configuration.

I've confirmed through photos that the original hands are Dauphine, gold - but before purchasing I need to know the exact minute hand length (center hole to tip, in mm) correct for this reference.

Does anyone have a 2830-7 SC with original hands they can measure, or know the correct length from experience?

Photos of my movement and case back attached. Thank you very much.

Thank you for the reply! I should have clarified this in my original post, the hands in the photos are not original. My grandfather replaced them at some point, so measuring them won't give me the correct reference length.

The current hands are stick/baton style (not the original Dauphine). I've confirmed through other photos online that the original configuration for this ref. 2830-7 SC was Dauphine gold hands.

My question is specifically: what is the correct minute hand length (center to tip, in mm) for the original Dauphine hands on this reference? The dial diameter is approximately 27-28mm for a 32.1mm case.

Does anyone have a 2830-7 SC with original hands they can measure, or know this from a parts catalog? Thank you!