Today came this Amec watch. I can't find a reference to Amec watches - and its not the engineering company of that name which wasn't formed until 1982.
The case is 33mm across, and appears to be all aluminium - as indeed it was described on ebay.
Inside is this no-jewel pin-pallet (edit: cylinder - thanks Mirius) movement. I can't see any markings, and I can't ID it. So if anyone recognises it I'd be grateful.
The bracelet is marked 'Made in France' - so it may be a French movement or possibly German.
Its running well and keeping good time so far.