I've recently acquired this Buren Chrono-Matic that's a bit of an oddity. The Buren logo is applied and there is a nice red dot at the three minute marker of the 30 minute register. The dial is signed Singer with the appropriate JS and Singer markings on the correct place. The rest is all Hamilton 11002-3 and the movement is the straight cal. 11. Has anyone seen this dial configuration before, or know anything about it. Is it unique? I have been researching it for the last two days and have come up empty.