Size Ball Bearing in 35mm Summicron v4

[fti]

Hi folks.

Does anyone know the size of the ball bearing in a 35mm summicron version 4. This is the small springloaded ball which is responsible for the aperture click locks.

Thanks.

 

[fti]

1.5mm

1.5mm

I've managed to find out the size of the ball-bearing. It's 1.5mm.

I explained my problem to Will van Manen in NL and he was nice enough to send me a set of different size to me as a courtesy. Great service.