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Scan below shows obvious guilotined/scissor cut perforations on some extremely poor quality 1d's.

1. On r/h stamp, there's a missing perf hole along top and base next to left hand corners. Is this simply from a broken perforator pin?

2. On left hand stamp, there appears to be a size difference. So much so, that when overlayed onto the other one, (as per scan 2), the perfs of the other stamp hardly show at all.

Is this because its a booklet stamp and they're different sizes?

I thought that with the vertical perf machines, the size was constant?

Could be showing my absolute lack of knowledge in this area here, so public humiliation accepted.





Browny.

Hi Browny

This would appear to be a stamp from a coil machine. The sheets were guilotined into strips and then each strip was stuck together by the top & bottom selvedge to form long strips which were rolled up into coils. You also occasionally find similarly made ½d roo coils and 1d roo perf 'OS' coils.

While I have used the term coil machines, I believe they were typically used as internal dispensing machines by business and government departments rather than as public machines where stamps were individually purchased. If this is the case then they "coils" were made in-house rather than by the PO.

Hopefully someone with abit more in depth knowledge will clarify this if I have made any errors.

Cheers
David

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At first glance I was tending along David's line of thought - at least for the top left stamp.

And then the more likely reason occurred to me. Especially seeing the other 2 stamps are far too wide to be of made-up coil stock.

Some oldie carelessly snipping off stamps as kiloware for charity has created these inadvertently, and a later collector has soaked them off.

Why?

As the top and borrow of each is ALSO clipped with scissors.

As David says the "coil" rolls were made of strips of normal sheet stamps. Indeed one often finds monograms used as part of "coll joins"!

And as Arthur Gray told me: "that is about the ONLY off cover Roo coil pairs I'd even be 100% certain are genuine".

To separate those you needed only to tear along the perfs. No-one would use scissors to separate them.

Therefore coil stamp or pairs usually have the left and right snipped look, but NOT across top and base.

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Thanks PPA and Oz.

I'm still unsure why the left hand stamp is so much wider than the right hand one. The lower picture shows the left stamp from the scan above overlayed completely onto the right hand stamp.

I've lined the perf holes up so a good judgement of width can be made.

Obviously the left hand stamp even with the perfs trimmed is significantly wider.

Is it normal for there to be a large discrepency in stamp width on the perforators of the 1d?

Cheers.
Browny.

The stamp DESIGN is identical in width on all stamps on the plate you'll find.

All look the same width to me.

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Hi Guys (the use of the word guys in this case is non-gender specific)

When I replied yesterday I was only seeing scan 2, the overlaid stamps. Now that I can see both scans I am sure that Glen is correct, that it is just careless scissor work.

With regard to the width of the stamps I can only make the following conjectures. This could have happened if the vertical perfs in the comb are not all exactly the same distance apart and we are talking fractions of a mm here, or it is possible that the holes are different sizes because the pins are slightly tapered therefore sheets at the bottom of the stack have smaller holes than those at the top or that worn pins have different diameters to new pins.

You really need to find someone with a lot of technical expertise with comb perforaters to answers this properly.

Cheers
David

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at - http://www.premierpostal.com

Somewhere in one of the thick Brusden Whites is a description of one stamp - I forget which - that was made in two passes, one to print the left side of the pane then reversed to print the right side. A printing and hence perforation gap of wider than normal could arise from this process. Can anyone recall which stamp it was? I recall it was to use paper of non-standard size in a time of need, that would not fit the perforator or the press or both.

I would love to see one of the old time perforators at work, for it would answer many questions. For instance the OS punctures are not very constant from stamp to stamp, even in a block, as if there was substantial movement or flexibility in the pins. Anyone else noted this?