25. Machin (E) 50p-69p

Y1719

• 1995.050.01 has the duller AY3 fluor when compared with 1994.050.01.
• 1996.050.01 has a white back.
• 2006.050.01 is only available from the Victoria Cross Prestige Book (DX37) - the head is closer to the left frame than 1996.050.01.
• 2003.050.01 and 2003.050.02 have bluish gum, whilst 2005.050.01 has creamy gum.
• 2005.050.02 is only available from the Trafalgar Prestige Book (DX35).

Y1719b

Y1757g

• 2009.050.01 is only available from the British Design Classics (I) Prestige Book (DX44) and is a completely different shade from 2007.050.01.

U2911

• 2009.050.02 is self-adhesive with security slits.

U2917

• 2010.050.01 is self-adhesive with Type 3 security slits. and codes "MPIL" and "MA10". Printed Sideways Left.
• 2010.050.02 is self-adhesive with Type 2a security slits. and codes "MPIL" and "MA10". Printed Sideways Left.
• 2010.050.03 is self-adhesive with Type 2a security slits. and codes "MPIL" and "MA10". Printed Sideways Right
• 2010.050.01 - 03 originate from George V Accession Prestige Book (DX50) but 2010.050.03 is only known to exist used on official FDCs.
• 2011.050.01 is self-adhesive with Type 2 security slits. and codes "MPIL" and "M11L". Printed Inverted.
• 2011.050.02 is self-adhesive with Type 2 security slits. and codes "MPIL" and "M11L". Printed Sideways Right
• 2011.050.01 - 02 originate from William Morris Prestige Book (DX52) but 2011.050.02 is only known to exist used on official FDCs.

Y1719e

• 540.2 is only available from the British Army Uniforms Prestige Book (DX40).
• 540.3 has Inset Bands at thr Right (IR) is only available from the British Army Uniforms Prestige Book (DX40).

Y1757j

• 2010.054.01 originates from the Classic Albums Prestige Book (DX48). The first recorded usage of the Garamond typeface for the "54" (known as "Type 2").
• 2010.054.02 originates from the 350th Anniversary of the Royal Society Prestige Book (DX49). The only other recorded usage of the Garamond typeface for the "54" (known as "Type 2").

Y1719d

Y1758

• 1994 and 1995 issues are Yellow Fluor (AY), 1996 issues are Blue Fluor (AB).
• 1994.060.01 is the generic number regardless of the booklet source (GQ1 or GQ2).
• 1994.060.01a has one 3mm Inset Band at Left in postions 1 and 3 from book of 4 - GQ1 issued 9th August 1994.
• 1994.060.01b has one 3mm Inset Band at Left in postions 1 and 3 from book of 4 - GQ2 issued 4th October 1994.
• 1994.060.02 has one 3mm Inset Band at Right in postions 2 and 4 from book of 4 - GQ1.
• 1994.060.03 has two different size bands (but NOT Inset Bands in postions 2 and 4 from book of 4 - GQ2. CREAM GUM
• 1995.060.01 has two normal 4mm Bands and is from books of 4 - GQ3 issued 16th May 1995. WHITE GUM
• 1996.060.01 has one 3mm Inset Band at Left in postions 1 and 3 from book of 4 - GQ4 issued 19th March 1996.
• 1996.060.02 has one 3mm Inset Band at Right in postions 2 and 4 from book of 4 - GQ4.

Y1719e

Y1719f

• 2010.060.02 is only available from the London 2010 Miniature Sheet.
• 2010.060.03 is only available from the Britain Alone Prestige Book (DX51).

Y1719e

Yxxxxx

• 2009.062.02 originates from Treasures of the Archive Prestige Book (DX46) and has a pale head.
• 2010.062.01 originates from Classic Albums Prestige Book (DX48) and is a deeper shade.

Y1720

• The Harrison printing has a thinner value than the Enschedé version which also has weaker phosphor bands and a white back.
• 1996.063.02 has 11.5mm between the phosphor bands.
• SG doesn't differentiate between 1996.063.03 and 1996.063.04. (the former has a narrow left bar and the latter a narrow right bar. Overall they both have a 12.5mm gap between the phosphor bands.
• 1997.063.02 is the generic number regardless of the booklet source.
• 1997.063.02a is from the Book of 4 - GR3 issued 26th August 1997.
• 1998.063.01 is from the Book of 4 - GR4 issued 05th May 1998.

Y1759

• 1996.063.05 has one 3mm Inset Band at Left in postions 1 and 3 and is the generic number regardless of the booklet source.
• 1996.063.05a has one 3mm Inset Band at Left in postions 1 and 3 is from the Book of 4 - GR1 issued 8th July 1996.
• 1997.063.03 has one 3mm Inset Band at Left in postions 1 and 3 is from the Book of 4 - GR2 issued 4th February 1997.
• 1996.063.06 has one 3mm Inset Band at Right in postions 2 and 4 and is the generic number regardless of the booklet source.
• 1996.063.06a has one 3mm Inset Band at Right in postions 2 and 4 is from the Book of 4 - GR1.
• 1997.063.04 has one 3mm Inset Band at Right in postions 2 and 4 is from the Book of 4 - GR2.

Y1721

• 640.2 is only available from the Booklets of 4 (GS1).

MS2146

Y1722

• 2000.065.02 is from the Book of 4 - GT1 issued on 27th April 2000.

Y1722a

Y????

• 2010.067.02 originates from the London 2010 Miniature Sheet. Bands fluoresce Yellow.
• 2011.067.01 originates from the WWF Prestige Book (DX51).

Y1723

• 2002.068.01 rreacts to short-wave ultra-violet, whereas 680.2 reacts to long-wave.
• Although 2003.068.01 is from the "Byfleet" series it is only known on Intermediate paper (TRI).
• 2005.068.01 is only available from the Battle of Trafalgar Prestige Book (DX35).

2298

• SG changes it's numbering system for Self-Adhesive (S/A) stamps such as the one above (and the 42p amongst others) reverting to main catalogue numbers, hence no "Y" prefix.
• 2002.068.02 is the generic number regardless of the booklet source.
• 2002.068.02a is from the Books of 6 NB1 issued 4th July 2002.
• 2002.068.02b is from the Books of 6 NB2 issued 28th May 2003.
• 2002.068.03 has short bands (S17) clear of the perforations at the bottom of the stamps.
• 2002.068.04 has short bands (S16) clear of the perforations at the top of the stamps.

U2918

• 2011.068.01 no source code. Date M11L. T2a cuts.
• 2012.068.01 no source code. Date M12L.