Amazingly the reservoir still works, but I do needthe screw on ring for the body to hold the cap on.

Which model is that? Touchdown Crest?

Reason I ask, is that I've got one in green striate, which is missing a cap - and it's useful to be able to ask for a 'model X' cap when hunting down a replacement...

Deacon, strangely enough my one has a working fill system too, perhaps as a result of the original owner losing the cap???

Nice find... G

I think it's a Crest, but I am very new to this. So if any one can make a better identification, we would both be grateful!

This is after a good cleaning, WOW!