Up for Buy-It-Now is a new old stock master cylinder repair kit, Mopar part number 939798.  This item was obtained from an old service garage and is not a newly remanufactured part.  According to my  Mopar parts manual, this is used on the following models and years:

1936 Dodge Truck..2 Ton, Models LH45, LH46, LH47, LH48
1937 Dodge Truck..2 Ton, Models MH45, MH46, MH47, MH48
1938 Dodge Truck...2 Ton, Models RH45, RH46, RH47, RH48
1939 Dodge Truck...2 Ton, Models TH45, TH46, TH47, TH48, TH49
1940  Dodge Truck...2 Ton, Models VH45, VH46, VH47, VH48, VH49, VS45, VH47, VH48

  The kit is in brand new, never used condition and is free of any damage.  The rubber parts are still very soft and flexible.  This particular kit does not have a piston in it.  Please feel free to E-mail me questions.  International bidders are always welcome.  Thanks for looking!