Picked up at a reasonable price. Turns out to be in much better shape than anticipated! Runs great, and must have belonged to a very careful gentleman.. Caliber 3615 21J / Automatic Serial 1711414 Case ref: 864-63 (1963) Lug width: 18mm Size: (w/crown 38mm) 35.5mm x 45mm
I have got a close relative. Dial and hands differ but I think the rose case is similar. edit - when I think about it though- I am pretty sure mine has 19mm between the lugs.