Simpsons Stamp vs Label

[Kendoll]

Why do some Simpsons brushes have a stamp with the Simpson name, and others have the label? Here is an example:

vs:

 

[Kyle89]

I always thought it was because some handle designs would cause the stickers to fall off, but someone please correct me if I'm wrong.

 

[StuMcB]

I always thought it was because some handle designs would cause the stickers to fall off, but someone please correct me if I'm wrong.

I thought the same. But could it be new stock V NOS?

 

[EclipseRedRing]

I have read that Simpson stickers were originally designed to deteriorate and fall off, the reason being that the presence of a perfect sticker would indicate that a brush had never been used. As far as I know, models such as the Eagle 3 and M6 do not have stickers for the reason that they are impossible to apply without being wrinkled due to the specific handle shape. That is certainly true for the M6 and those brushes which have lables, have had them applied by their owners rather than by Simpson. I could be very wrong here.