I have a watch that is similar to the Portex you feature here but, mine is a Prely. I am also trying to find out info on it. I took it to a local watch repair shop here in california and was told that the movement is a Landeron movement, but he was not able to tell me much more. Have you ever heard of such a watch? It looks exactly like the Portex. Any info would be helpful.
I have a Telor chronograph with,Landeron 248 cal. in 18k,the replica watch is a high 7 and keeps excellent time. Would anyone with imformation on the name Telor please e-mail me.