Finished with the fake Rolex. Stripped down, cleaned, broken bits for the calendar change replaced from another broken fake which seems to have been a just about identical movement, oiled and greased and to my amazement it worked. Can't help but wish it was a decent watch considering all the work but it was my first mechanical auto movement and I did learn quite a bit from the exercise.
It was astonishing how poor the workmanship was. Inside there were metal shavings all over the place and yet it worked when bought. There was next to no lubrication in the watch and it appears it could have been put together dry. No identifying marks but I am pretty sure it was a Chinese ST6 type used in loads of fakes as I was able to find a tear down of one used in a fake Omega.
I feel a bit more confident tackling a watch for my son now, ANACB Bulova - should be fun, got a working movement for £14.00 and found a chunky case to fit.