I don't know about a 50 model but my 38 Master has the 3.73. The Master Deluxe had the 4.11. I believe you can buy rear end gear sets that will give you a 3.55 ratio.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.