Kg6 Booklets - Staple Sizes

I have been looking at this tread

Canada Modern Stamp Perforation Hole Size Differences

and I have often wondered about the vaguely similar situation with the different staple sizes used on some of the War Time George 6 booklets. Unitrade does not list these.

I assume the booklets were stapled by the printers but why did they use or even have different size stapling machines.

Why have at least three different sizes 12, 14 and 17 mm. They all seem to work OK on the final booklets. This seems inefficient if only from stock keeping and maintenance points of view.

Were they used for other purposes that required different sizes and if so did the machines have to be modified to produce the stamp booklets.

Could one machine be used with more than one size of staple?

And lots of other similar questions

I have never seen any article about the production of these booklets rather than the printing of the stamps. and if anyone has a reference I would like to see it.

AQ.

The relatively old McCann's catalogue of Canadian Booklets lists all the various staple sizes for these booklets. However, it does not really go into details about how and why as per your listed questions.

Since it was war time perhaps it was difficult to source staples since they are made of steel?

Commercial machines use wire fed off a spool to form and attach staples. So, another question is: are the different staple sizes all the same wire gauge?

Contact Bernd Duddeck who is the Canada stamp booklet specialist.

hy-brasil

From what I can tell they are all the same guage.

So that idea of wire fed machines sound possible. I still wonder why they had three different sizes unless the machines were adjustable and the small size staples were used to save the metal when they were running short.

I have not seen any info that suggests this though.

AQ

Jogil

I have no means of contacting Bernd Duddeck. Does he follow this forum?
If you have contact details for him I could pm you my email address

AQ

Anthraquinone

PM your email address to me.

Jogil

Can you please check that email address you sent me I am getting mail delivery failures.


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AQ

Anthraquinone

Try it again since I just used the same email address and got a response from him.