Where is the width stated on an Albion saddle?

I am trialing an Albion saddle and my trainer has one but neither of us can find it on the saddle. Do you just have to look up the registration number?

Most Albions have it stamped on the sweat flap, left hand side or both. It’s under the nylon straps the billets are sewn to. Over time, the imprint can be worn off. Watch the videos Pelham Saddlery has on their website for Albions. The more recent videos show a shot of the stamp. The width, serial number and whether it’s a high head or low head are all stamped closely together.

It might be worn off as mentioned above. They’re usually easy to find but this info can also be found for other saddles in these places:
sweat flap on bottom or right side of sweat flap, vertically stamped
billet guard
underside of sweat flap, (panel side)
stirrup bar

Mine doesn’t have a stamp on it either but it was custom made for the original owner. If you email Albion with the serial number they will be able to tell you if was a custom made tree or if maybe the the stamp has just worn off.