1975 Environmental Dangers 10c Pollution - Missing Perforations

Can anyone help please?

I have no way of telling if this comes from an upper or lower pane but the missing perforations from the left selvedge continues up and down on this sheet, as you can tell from the edges where it is torn.

I have the latest Brusden White and this is not listed (and BW are very good when it comes to not only listing but showing an image of this type of error). It surely must be known, has anyone come across it?

Look forward to some feedback

Sheesh,
I read something about this within the last 3 months, goodness knows where.
Sorry cannot offer proof.
I somehow recall not an error, but a way to identify the position of the pane.
(not regarding your stamp however)
Cannot remember the verbiage for that perf. style.

Thanks Rod222

I have a 20x of both the Pollution and Bushfires and neither of those have missing perforations like this. But what you say could be true though I would think BW would mention this.

I also believe within the last three months (or so) having seen something on this but with all the stamps I've looked at in BW I can't be sure if I'm thinking of another stamp.

(Example of missing perforation hole - 1982 National Stamp Week)

EDIT

I was so surprised by finding this that I didn't bother to check if there were any varieties.

I did know it was perforation 14.40 x 14.03 but after having a look at the individual stamps I can say it is Sheet C Upper Pane, rows 5 - 8 (top left corner is 5/1 - retouch over "Au" of "Australia".

So the part sheet is positioned BUT still not answered.

Am continuing to search for information, help please.

Aha! your comments joined two wires in the memory.
Perhaps I saw it in the ACSC catalogue (circa 1975) I recall it having pane descriptions and layouts.

I'll have a bo-peep.

All I have is Rembrandt press
P 14.25 / 14.75 x 14
KP6T paper inc. helecon

sheets of 100 divided by plain stamp size gutter into panes of 50, 10 rows of 5

The Rembrandt Press was of 300 stamps, was it not?

So you would have 2 x rows of 150 stamps (3 sheets of 50 each row)

Rembrandt did not have a perforator, so it was done on the Grover
This is possibly where this arose.
Rembrandt was sheet fed I think, and perfs depend on what size sheet you are printing on.

Caveat. all foggy memory, I am giving up, its hurting my head.
I have seen this perf style before...somewhere.

Thanks Rod, foggy memory or not your information is much appreciated. I have now located the information you provided (page 9/xxiv) and as you say this allows for this possibility.

Still, like you, I'm sure I have seen/read something on this - somewhere???

The missing perf section serves no purpose and would create difficulty in separation (which the postal worker surely would've realised).

This is the bushfire stamp showing how the perfs should look.