BSA Chorehorse Generator set

Folks,
I have just acquired a BSA Chorehorse generator set. It is the 15V version and on the plate is shows the WD Serial number as B9184/M153/54 , does this mean that it was made in 1954?
It also has a second brass plate rivetted on the generator side from a firm called LSE, the S is in a smaller size and is underlined. There is a serial number G12026.
I'm guessing that LSE bought the set from the MOD and then sold it on. Has anyone come across this firm before please.

The date is correct, I have four of these, 2 x 15VDC, a 30VDC and a 240AC, somewhere I have a manual and I have a military box with spare parts. I will have a look tomorrow but I don't remember seeing another plate on the generator.

Maryalice