Componon S - no lens cap

Hi,

Acquired excellent condition 80/4 lens but without a lens cap. Can anybody has an idea what is its external diameter? Schneider's caps are not sticked to the filter thread, but are held on the lens body directly. I could find that this lens has filter thread 43mm.

I think this one would fit, but I'm not sure...

http://www.ebay.de/itm/Schneider-Kreuznach-Aufsteckdeckel-fur-45-5mm-Durchmesser-NEU-

I'm guessing that you just bought it and it hasn't arrived yet, otherwise you could just measure it yourself, right?

Measure the outside diameter and order the lens caps on the internet.