Treble-0-lectric guarantee printing block

[unravelled]

This is a printing block I bought at a boot fair at least 25 years ago. It appears to be for a treble-0-lectric guarantee certificate.

 

 

Does anyone have original paperwork which matches this?

 

I presume the cutout at the top would be for a serial nunber printer.

 

It came with a smaller block with just the word "Guarantee" on it in a similar style.

 

Thanks

 

Dave

[BernardTPM]

There's something very like it shown on this Treble-O-Lectric website (Third photo down).