Great Britain Machins by Adminware

50p slate grey

Self-Adhesive, Security slits
First seen: Jan 3, 2013

Gravure

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Water-activated gum, Security code

Also exists:

50p deep ultramarine (Large size)
50p ochre
50p sand
50p light grey
50p slate grey (Data Matrix Code)

Paper	Printer	Security Code	Issue date	Source	Gum	Security Slits	Backing Paper
2-band (9mm violet) phosphor
2012 year code
OFNP	De La Rue	12	Jan 3, 2013	Sheet	S/A	Type 1
2017 year code
OFNP	De La Rue	17	Oct 23, 2017	Sheet	S/A		- Type 2u
2019 year code
OFNP	Walsall	19	Sep 2019*	Sheet	S/A		- Type 2i

* Issue date unknown.

50p slate grey

Water-activated gum, Security code
First seen: Sep 19, 2013

Lithography

Paper	Printer	Security Code	Other identification	Issue date	Source	Booklet singles	Gum
2-band (9mm violet) phosphor
2013 year code
OFNP	Enschede	13 + P	perfs inverted	Sep 19, 2013	Booklet	DP460 Merchant Navy Prestige booklet DP460 Merchant Navy Prestige booklet 4 x 5p ash pink (red-brown) 4 x 50p slate grey	PVA
2015 year code
OFNP	Cartor	15 + P		Jun 18, 2015	Booklet	DP488 The Battle of Waterloo Prestige booklet DP488 The Battle of Waterloo Prestige booklet 2 x 5p ash pink (red-brown) 2 x 10p light tan 2 x 50p slate grey 2 x £1.00 wood brown	PVA
2018 year code
OFNP	Cartor	18 + P		Dec 4, 2018	Booklet	DP542 Harry Potter Prestige booklet DP542 Harry Potter Prestige booklet 2 x 1p crimson 2 x 20p sea green 2 x 50p slate grey 2 x £1.25 holly green	PVA
2019 year code
OFNP	Cartor	19 + P		May 24, 2019	Booklet	DP555 Queen Victoria Bicentary Prestige booklet DP555 Queen Victoria Bicentary Prestige booklet 2 x 2p dark green 2 x 50p slate grey	PVA
2020 year code
OFNP	Cartor	20 + P		May 8, 2020	Booklet	DP572 End of the Second World War Prestige booklet DP572 End of the Second World War Prestige booklet 4 x 5p ash pink (red-brown) 2 x 50p slate grey 2 x £1.63 sunset red DP582 Star Trek Prestige booklet (Nov 13, 2020) DP582 Star Trek Prestige booklet 2 x 2p dark green 3 x 50p slate grey 3 x 2nd light blue	PVA
2021 year code
OFNP	Cartor	21 + P		May 28, 2021	Booklet	DP590 Paul McCartney Prestige booklet DP590 Paul McCartney Prestige booklet 2 x 2p dark green 2 x 10p light tan 2 x 50p slate grey 2 x 1st Royal Mail red	PVA

Disclaimer: We apologize for any errors of information that might be present. Your feedback is appreciated.

For even more varieties on Machin stamps, check out The Complete Deegam Machin Handbook (simply the best Machin
handbook available anywhere) by Douglas Myall - click for details.

Booklet pane numbers used courtesy the Modern British Philatelic Circle
who publish 'The Bookmark' Catalogue