Spring bar for SMP

[alucard666]

Hi,
Anyone know what the correct spring bar width and length is for the steel bracelet on the SMP 300 Chrono?
Ofrei has a few and I am confused which one will fit.
OME-BAR-03
OME-BAR-04
Swiss Made 1.8 mm Thick Double Flange 20 mm Spring Bar

 

[Q5?]

I recommend their generic ones .....
SB-626-B12 1.8MM x 20mm 12 pcs $2.00

http://www.ofrei.com/page_203.html