Originally Posted by
olddurace82
Under the decal you can make out the stamping reynolds 531. I do know the BB is italian threaded. I'll see if I can get some better pictures and post them here.
Yes, please do: this may be one of the only places where info on one of the more obscure Swiss bike marques will be archived...we need to see more

And thanks to Chombi for the great detail shots of that unusual stem: I have a feeling it will be prone to creaking as it's similar to the wedge design that Cinelli used for their creak-prone 1R...but maybe this variation was the cure for that!
BTW, just in case the question gets raised again:
early Titan stems and handlebars (primarily chromed steel) were
not a product of this Titan bicycle company and were made in Belgium, not Switzerland.

(photo snagged from Bertelli website and is copyright)