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Walsall " Error of Perf " Booklet 1990.
Up to 1993 all booklet panes printed by Walsall Security Printers were perforated 14 x 14. These changed in 1993 conforming to the Harrison and Questa or Royal Mail standard perf gauge of 15 x 14 *
During November of 1990 a perforation error occurred on certain 1st class booklet Panes containing None Value Indicated stamps ( NVI ) the panes of 4 were ACP/ PVA gum.
The perforation on these booklet panes was found to be 13 x 13 ( in error ) instead of 14 x 14 . *
These were discovered by keen eyed collectors in the bar code type booklets where the panes are trimmed by guillotine top and bottom. The booklet printed in litho by Walsall security Print are now catalogued by Stanley Gibbons as HB3A. It is available with Plain pane, and cylinder pane W1 W1 , there is also a cylinder booklet with a dry print of the cylinder number .
Walsall " Error of Perf " Booklet 1990.
Up to 1993 all booklet panes printed by Walsall Security Printers were perforated 14 x 14. These changed in 1993 conforming to the Harrison and Questa or Royal Mail standard perf gauge of 15 x 14 *
During November of 1990 a perforation error occurred on certain 1st class booklet Panes containing None Value Indicated stamps ( NVI ) the panes of 4 were ACP/ PVA gum.
The perforation on these booklet panes was found to be 13 x 13 ( in error ) instead of 14 x 14 . *
These were discovered by keen eyed collectors in the bar code type booklets where the panes are trimmed by guillotine top and bottom. The booklet printed in litho by Walsall security Print are now catalogued by Stanley Gibbons as HB3A. It is available with Plain pane, and cylinder pane W1 W1 , there is also a cylinder booklet with a dry print of the cylinder number .
They are also known on panes with a low optical brightnig agent ( OBA) , or alternativly if we use laymens terms a dull surface to the paper if checked under a UV Lamp.
It must be assumed that these stamps were also sold to the general public through the post offices and retail outlets, therefor they must have been used by the people for normal everyday postage.These are quite sought after stamps and carry a premium over the norm, they are also missing from a lot of collections.
If you collect used singles the best way to find them is from kilo ware dating from this period, if I recently sent you used Machins it is quite possible that you have used copies amongst the contents. Make sure you check them over fully before disgarding them as duplicates.
Remember, to make your task easier you only need to check flame red 1st class stamps printed in Litho with a straight edges (either) top or bottom. Litho stamps can be detemined under a 10 x glass by the clear crisp lines of print around the borders and value tablet compared to jagged edges ( or pips) on phogravure issues.
* Note: All perforations are quoted to the nearest decimal point.
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