None of the factory catalogues or factory publicity material shows decals
, so for authenticity we are forced to look at magazine articles or original & untouched bikes.
The Owners handbook shows a "minimum oil level" decal
on the cut away tank depicting the intank filter.
What I was told a very long time ago by a retired bike shop owners was the decals
came with the bike and were fitted by the dealers.
The reason for this was the painted parts were painted a long while before they went onto a bike and a lot of painted parts are common to a large number of different models with different wheel sizes.
Pre WW II BSa used varnish transfer and these were a lot more robust so would take a few bumps during transit & were factory applied.
However the water slide type were quite fragile so the dealers put them on prior to sales.
The oil tank had a felt or wire filter over the return line inside the oil tank and on those models there was a minimum oil level decal
placed at the bottom of the oil filter, about 1/2 way down the tank.
As shown in the photo in the previous post there can be a garter belt decal
on the tool box lid.
Depending upon which tail lamp bracket was fitted there may have been a set of gold rifles with the letters BSA under them on top of the tail light bracket.
It could also have the same + 600 cc and the 600 cc was a seperate decal
On a rigid bike with the oiled foam air filter there may have been an AMAL decal
regarding the cleaning & oiling of the filter element but usually this was on the inside of the filter cover.
AFAIK there was no AMAL decal
on plunger framed bikes but all plunger had the tail lamp bracket decal
None of them had a "Made in England" in any one of the 5 variations
So a "full set" for a 49 M21 would be 2 to 4 depending upon the model.
There may have been a Smiths decal
on the speedometer regarding the trip meter.