I have been looking at identifying 4-speed gearboxes again and asking some questions on the Wolseley "Wasps, Hornets and Hornet Specials " Forum . I still feel the subject is utterly confusing and all the more so because some gearboxes are Morris, others are Wolseley and there is the odd real or alleged M.G. example too.
A contributor on the Wolseley Forum has commented that a key number to look at on a gearbox is what he calls the "Sanction Number" (a term I had not heard before). It is the number below the horizontal line in the picture below. If I understand him correctly the number '74' will only appear in this position on a Morris gearbox which, in this case is a 4-speed and almost certainly Minor (the J2 remote is not relevant).
![Image](http://farm4.staticflickr.com/3766/11148186535_c5fc675955_c.jpg)
![Image](http://farm9.staticflickr.com/8064/8164760660_a7d849f8a7_z.jpg)
The contributor also commented on the picture above (a synchromesh box which I guess is 1934 Minor- but you may know better) -
"I have a list of sanction numbers for several models of Wolseley in the early 30's and 110 is not one of them.Some models had more than one sanction number in any one year presumably to indicate a significant change."
He provided this Wolseley list which probably includes some gearboxes which would not fit a Minor -
![Image](http://farm6.staticflickr.com/5522/11147608165_55a736068a_o.png)
I think 3-speed boxes are fairly well understood but a 4-speed which fits an M-type can be Minor or one of quite a number of Wolseley permutations. Wouldn't a set of early 30's Nuffield gearbox catalogues be great?