Wollensak Ex. WA 159mm f12.5 - Flange Focal distance ?

Hi,
I have been asked to make a WillTravel 8x10, and need to find the needed lens data.
Anyone who has information / link on the flange focal distance for the Wollensak Ex. WA 159mm f12.5?
Or have the lens and are able to measure it?
I.e. distance from rear of shutter to filmplane/ground glass when focused at infinity.

Take a look at alphaxbetax.com- there's a great deal of Wollensak information on that site.

I've got one around here somewhere. Let me rummage in the lens locker.