I have my eye on a vintage Roamer watch, I think it may have an MST Roamer manufacture movement in, but I'm not sure. My question to any Roamer enthusiasts/experts is; can you tell if a Roamer has an in-house movement inside from the outside (writing on dial and caseback)? This one is a gold plated RW Roamer, has the Roamer crown symbol above the name Roamer on the dial, Super-Shock on the dial, and "Brevete" and "waterproof" on the case back. And the movement is 17 jewels. Attached is the seller's picture (not very big or well focused I'm afraid). I realise it may not be much to go on, but any help is much appreciated .