Picked this up on Ebay recently and find it kind of interesting. The rose gold case is 33mm w/o the crown with fixed lug pins and is in great shape. The dial is also in good shape and I don't see paint creep so it may actually be original. I can't find any movement numbers and the only writing on the movement is 15 rubis, swiss made. The watch runs well and keeps good time and due to the small bezel actually wears much larger than the 33mm case width.
I can't find much about Exactus other than the hammerhead mark 123 is Pfenninger&Cie SA. I'm guessing 1950's? Maybe an entry level solid gold watch in its day?
Any help in identifying the movement maker and number would be great.