Walter V-Drive Identification

[Tranquilo]

My Walter V-Drive is leaking at the out-put seal and the bearings are noisy after 42 years of service.
As you can imagine, its hard to read the numbers as this thing is older than Moses.
The numbers on the brass plates seem to be: W.M.O,.20-01 H (big plate=serial number?) and what seems to be an upside down 20-05 (small plate=model gear ratio?)
Its directly coupled to a Velvet Drive transmission that's attached to a Perkins 4-108 on a 1969 Columbia 43
Do the numbers make sense to anyone?

[Tranquilo]

[sarafina]

This might be helpful in figuring out what your numbers are;

http://www.waltergear.com/VD-Identify.pdf

[Tranquilo]

Yes I am at that point, just want to make sure i got my ducks in a row before I go ahead and send it in to Waltergear.

[F51]

I got great customer service from the factory when my Walter drive smoked. They were very helpful in letting me know what the worst-case cost would be before I sent them the unit for evaluation. They wound up doing a complete rebuild with new gears, seals, etc and got it back on the road to me in less than a week. Good company to work with.