I agree about 8444 being the code for a C15A.
But..... your information about it having a winch means that some parts have probably been changed since it was made since I don't believe any C15A were originally fitted with a winch.
Possibilities include:
Data tags exchanged onto another chassis (all C15A had 101" wheelbase)
A C15A cab mounted on a CGT chassis (also 101" WB but usually with larger steering joints and 20" rims, has a winch)
A winch retrofitted to a C15A
Photos will help us to suggest which it might be. If you are having difficulty adding photos, this link may help
http://www.mapleleafup.net/forums/showthread.php?t=19
Areas that might give a clue about the identity are the winch area and front axle steering joints.