Here is the pertinent information for DADS50 link (nice find - this had been posted by a Hemming site for many years and then it disappeared):
1950: 0 then:
11/91 then 32 etc. 1 ½ Ton 137” w.b. 29.4 H.P.>
11/91 then 42 etc. 1 ½ Ton 161” w.b.
13/93 then 12 etc. ½ Ton 116” w.b.
13/93 then 14 Pick-up Delivery 116” w.b.
As DADS50 posted:
01314 preface = 0 13 14 = 1950 Pickup Delivery 116" w.b.