Andy/Peter,
Here's what a Go 145 main ID plate looks like, albeit after about 40 years below the ground.
http://www.mediafire.com/imageview.p...wyxbs0&thumb=4
This one came from the RAF Kenley hoard that 'surfaced' in the 80s. Only part of the W.Nr. can be read--it's, I believe, 103? or 107?.
Steve