Check out 9401s on the internet- print up a few pics of the gens and compare them to your watch.
Your crown guards have been trimmed but could use a little fine tuning.
The crown appears to be a 24-700 which is early and I guess ok. Tudor Collector says the 9401 was introduced in 1976, but it seems that I had read as early as 1970. 1976 would be a 24-702 crown- which you can get from Athaya, but you'd need to change out the tube also, so maybe you just go with the 24-700 crown for now.
You need to ditch the pearl- that small metal surround just doesn't cut it. Get yourself an all acrylic pearl. Try Ofrei or Athaya.
I can't tell if the lugholes have been drilled- looks kinda like it. The bevel on the lugs is fairly pronounced- maybe overly so, but like I say- look at some gens. The Rolex springbars would be nice if they fit.
If you don't have a Tudor bracelet, a Nato strap would be fine, or I like those leather straps from cheapnatostraps.com.
You don't say which movement it has, but a 2824 or 2836 would be fine. Crown position on the case looks good- maybe it's a 2824.
A little light aging of the dial and hands- maybe with a tea stain- can't hurt.
I'd say enjoy your watch!