Craig, nor would I put a stem in warm soapy water, but as I read the leaflet I thought you should
know.
No reason to mention that it is a fine pipe, much better than mine which I only bought to try the system.
Without a shapenr. it could be from before it became an Orlik brand.
The pipe is not in the 1959 Orlik catalog but it is there in 1965.
It looks like an Orlik shape 84