So, are you saying that production Plunger models did not use the early toolbox?
If not, that picture could explain the fact that restored bikes sometimes have the early box.
The literature for new models was printed substantially before the bikes were made.
If there was no "new" tinwear available by the deadline for the photography then they used what they could get their hands on.
A catalogue image is not & never has been a definative answer as to what the bike looked like at the despatch dock.
Look at all of the catalogue images that show B50's with ivory frames.
There were 12 and only 12 press bikes made with ivory frames, all of the production bikes were black.
Similar with the twins.
They started off being ivory but reverted to black before the season ended but you will not find a catalogue showing them black framed.
People with no idea of what a bike actually looked like get a photocopy of the catalogue & build that bike because they are too lazy to do proper research.
Remember all the who har about rocket tank colours.
Now if an owner made the effort to get an extract from the dispatch books it would state exactly what the finish was but dozens right here swore on a stack of parts books they were all red.
Now BSA being BSA would not have fitted the old tool boxes, if the new ones were available, but if the only ones on hand were rigid boxes then the plungers got rigid boxes.
This was particularly the case with export bikes as BSA bought the space on the ships well in advance which even today comes at a substantial discount.
SO if they needed 300 plunger A 10's to fill the space that is what got loaded, right parts or wrong parts.
Now as it happens Ken , one of our club members bought his 1950 A 10 off the catalogue before they left the factory.
As far as we know he had the very first plunger A 10 registered in Australia as the ship off loaded 10 in Sydney before it off loaded 12 in Melbourne, so we got ours a week before Melbourne did.
Kens bike has the bigger plunger box fitted so it was not a case of use up the old stock first.
This is why I get so annoyed about "know all know nothings" like the AMCA issuing "value increasing authenticity certificates" without having the proper documentation to support their certificates .
Now if they certified you bike as being identical to the 19xx catalogue image that would be fine but the a-holes state that your bike is AUTHENTIC when in the case of many BSA's it is nothing like that.