[R-390] Allen Bradley Potentiometer Numbering Schemes anyone?

[Barry]

Does anyone know where I can find out the value/type of an AB pot I have?  It's part of a "new" 
(to me) Krohn Hite function generator and I have no schematic for it.  It's the main frequency 
control that's getting a bit erratic and would like to look for a possible replacement.

All it has are some numbers and letters stamped on the back and I assume some of those indicate 
the resistance, type, taper, etc., but I don't recognized the scheme.  It doesn't have one of of 
those long Clarostat-style numbers either (e.g. RVxxxxxx, JAxxxxxxx, etc.).

I don't have the numbers with me but I thought if someone could point me to a site where these 
are defined, I could reference them later today.

I do know it is a "Type J" but the other numbers aren't telling me anything.

Thanks,
Barry - N4BUQ