I know that those were made by Teisco in the '60s, although I've never seen one of the 12-string ones before. I also have no idea why Teisco decided not to put their regular logo on the headstock, and use the crown instead. Here's a pic of a 6-string one, in the hands of a Japanese dealer -- and even he doesn't have a model number for it. He calls it a Teisco, and wants 70,000 yen for it.
From the shape of the headstock, yours was probably made between '66 and the early '70s.
You might be able to find out more from the folks at
Teisco Twanger's Paradise - home of vintage Teisco guitars