I forgot to mention a couple of things. The pipe does have an inner tube, so it could very well be from the 1950s. I have an e-mail out to Brebbia to find out if there's any truth to the stamped stems being from 1953–1956.
We're heading up to Montreal, Quebec tonight for a couple of days. I posted in the B&M Retailers section the other week, but more eyes might see this here in WAYS. Would anyone be interested in meeting up at Blatter & Blatter on Saturday, May 13th? Maybe we can grab a bite or head to a cigar lounge nearby for a smoke? PM me.