T26 Hull Number?

[Ron]

Probably not. The numbering scheme back then was different than it is now, and these boats were made in the UK which itself was probably different as well. 476 should be the month and year of manufacture. The hull sequence number is probably 111. The latest boats (28's) stop at around number 380, and they started at 301. Tony must have ended production of the old boats in the higher 200's.