Hi,
Yes the seal number is very small, I would have a look at one at my local ford dealer but not a stock item due to age.
The numbers are very small, but will be the usual 3 set numbers like 125-140-10 for example for inner, outer and width.
I've thought of someone who no doubt has them hanging around, forgot he's doing a screamer pinto for someone at the moment, normally does old historic F1 engines, and older stuff than pinto.
I'll keep this thread/you posted I've got a nice cheap place for the seals anyway, very few sizes not made in viton, thought all viton were terracota colour, but there's a nice yellow is some sizes, yay colour co ordinated oil seals!!
tabetha