Morris Minor Owners Club

geoberni wrote: ↑Tue Jan 20, 2026 5:04 pm I'm not sure about Stephens info on the sticky label.
I don't know when the NCB101 number started being used.

Back when it was OE, there were numerous different versions for different applications.
The Workshop Manual makes it look like there were only 2 Control Boxes on Minors, the one that had the fuse box integral to it, and later the RB106/2.

If you look at the published Lucas fitment data there were some 10 part numbers across 3 model numbers just up to 1960, when the data I have was published.
Starting with the RF95/2, then the RB106/1 and the RB106/2.
Visually the difference between the 2 RB106 models is screw terminals became Lucar push on.

As a general rule, the different part numbers denote internal design differences, the suffix change denotes minor inconsequential differences.

As with Stephen's photo, my two spares are both RB102/2, pt no 37290F, one dated 1-68, the other 33-80.
I guess after '68, they were done altering the design of Dynamo Control Boxes.
Underneath, the '68 shows signs of the foam strip possible getting hot as it's gone hard and crisp, while the '80 one the foam is still pliable but at some time the car it was on had a problem, because the link between A/A1 had melted like a fuse and then been repaired.
I've tested them both on my car and both work, controlling a steady voltage.
The white 9 under the '80 one is from the trader wanting £9 for it at the autojumble. I can't remember what the other one was, but it must've been a similar price.

I've just noticed, as well as not have LUCAS on the side, the Steering wheel symbol is the opposite way up on the '68??
20260119_111031.jpg20260119_111300.jpg

Bill_qaz wrote: ↑Sat Jan 24, 2026 4:53 pm

geoberni wrote: ↑Tue Jan 20, 2026 5:04 pm I'm not sure about Stephens info on the sticky label.
I don't know when the NCB101 number started being used.

Back when it was OE, there were numerous different versions for different applications.
The Workshop Manual makes it look like there were only 2 Control Boxes on Minors, the one that had the fuse box integral to it, and later the RB106/2.

If you look at the published Lucas fitment data there were some 10 part numbers across 3 model numbers just up to 1960, when the data I have was published.
Starting with the RF95/2, then the RB106/1 and the RB106/2.
Visually the difference between the 2 RB106 models is screw terminals became Lucar push on.

As a general rule, the different part numbers denote internal design differences, the suffix change denotes minor inconsequential differences.

As with Stephen's photo, my two spares are both RB102/2, pt no 37290F, one dated 1-68, the other 33-80.
I guess after '68, they were done altering the design of Dynamo Control Boxes.
Underneath, the '68 shows signs of the foam strip possible getting hot as it's gone hard and crisp, while the '80 one the foam is still pliable but at some time the car it was on had a problem, because the link between A/A1 had melted like a fuse and then been repaired.
I've tested them both on my car and both work, controlling a steady voltage.
The white 9 under the '80 one is from the trader wanting £9 for it at the autojumble. I can't remember what the other one was, but it must've been a similar price.

I've just noticed, as well as not have LUCAS on the side, the Steering wheel symbol is the opposite way up on the '68??
20260119_111031.jpg20260119_111300.jpg

Had a look and left edge terminals down lookin from front, I have no markings at all. Opposite edge engine side some markings but difficult to get a good picture.
20260122_151723.jpg20260122_151723_1.jpg

geoberni wrote: ↑Sat Jan 24, 2026 8:06 pm While my 2 spares have the coding on the outside of the base, the one on my car is on the other side, like yours.

It's older, being 1963 and a 37290E, the others are an F suffix. 20260124_183524.jpg

Mervin wrote: ↑Sun Jan 25, 2026 1:50 pm Out of curiosity I just had to check my car's self parking, "clap hands" wiper motor! Lucas DR2.
The car was built in February 1962 and the date on the gear cover is 4 60, almost two years before the build date.

Bill_qaz wrote: ↑Sat Jan 24, 2026 10:03 pm

geoberni wrote: ↑Sat Jan 24, 2026 8:06 pm While my 2 spares have the coding on the outside of the base, the one on my car is on the other side, like yours.

It's older, being 1963 and a 37290E, the others are an F suffix. 20260124_183524.jpg

Thanks Berni I will get a better picture with some light on it.
Hoping its going to be 62 to match the other Lucas dates found.

Bill_qaz wrote: ↑Mon Jan 26, 2026 4:57 pm

Bill_qaz wrote: ↑Sat Jan 24, 2026 10:03 pm

geoberni wrote: ↑Sat Jan 24, 2026 8:06 pm While my 2 spares have the coding on the outside of the base, the one on my car is on the other side, like yours.

It's older, being 1963 and a 37290E, the others are an F suffix. 20260124_183524.jpg

Thanks Berni I will get a better picture with some light on it.
Hoping its going to be 62 to match the other Lucas dates found.

Very different number, so I suspect a later replacement?20260126_143244.jpg