Date code confirmation

[Bill_qaz]

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.jpg (164.82 KiB) Viewed 47577 times

20260122_151723_1.jpg (260.01 KiB) Viewed 47577 times

[svenedin]

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

I can't read it but I can just make out the Y in a circle logo and numbers. Very likely to be a date there.

Stephen

[geoberni]

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 (1.46 MiB) Viewed 47521 times

[Bill_qaz]

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.

[Mervin]

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]

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.

May have been swapped for a good used one sometime in the past, we're dealing with 64 years of history

[Mervin]

You are probably correct Bill. I don't know much history of the car prior to 1999. It did undergo some restoration/changes in 1993 though. e.g. 1098cc engine and gearbox replacing the original 948cc.
Doing some searching, the DR2 is apparently "rare" and commands a ridiculously high asking price.

[Bill_qaz]

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 (978.85 KiB) Viewed 46927 times

[svenedin]

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

Yes later, probably as I suggested, into the late 1980's or even later than that (I don't know when Lucas stopped making them). The model number was on the sticky foil label rather than stamped into the plastic base. I mistook the V for the Y in a circle symbol.

These were also sold as Lucas and Unipart reconditioned units in the same way as dynamos and starter motors were.

Stephen

[Bill_qaz]

Can't imagine it being that late as its been on alternator for a long time, the regulator is just a period dressing. I will look back through the files to see when alternator conversion was done.
Its of no importance its just out of interest, the other dated Lucas items are original to build.
Thanks Berni and Stephen for your info.