Morning All

Just been out to get serial number off my gearbox to pass to Ashcrofts but the location where it should be is blank, there's clearly nothing stamped on it. I don't suppose they've moved it somewhere else have they?

Found it. It was where it should've been, but it's so lightly stamped that the fine coating of corrosion had covered it up.
Even after some a light scrub, i had to get a torch on it at different angles to highlight the digits.