NEOFILA PRICELISTS MARKING SYSTEM
	Characters behind the digits:
nothing	Single stamps and stamp sets
a	Variant (usually imperforated stamp or paper variant)
b	Variant (usually different perforation or paper variant)
c	Variant  (usually color)
d	Variant  (usually of overprint)
e	Error
f	Forgery, falsh
g, h, j	Other variants
i	Inverted overprint
K	Booklet
Kf	Booklet-folder (souvenir booklet, usually of single stamp or single set)
KP	Prestige booklet
Ks	Booklet of the same stamps or sets, when stamps are printed only in this booklet
abK	Booklet of stamps with perforation or color different than single stamps.
L	Strip, when separate stamps exist too
LB	Lux Block (Imperforated S/S on carton paper)
M	S/S (sheet containing 1, 2,3,4,5 or 6 different stamps, issued only in this shape)
MS	S/S (M/S containing 7 or more different stamps, issued only in this shape)
MK	S/S or M/S of different stamps issued only in booklet shape
bM	S/S with different perforation than single stamps
MC	Stamp card
N	Variant of S/S (usually imperforated)
P	Tete-beche pair
PU	Two different tete-beche pairs
Q	Block of 4 or 6, when separate stamps exist
R	Special sheetlet (mini sheet), when stamps are printed in larger sheets too
RM	Special sheetlet (up to 6 stamps), but Michel Catalogue shows them as ‘Blocks”
abR	Sheetlet for booklet, with perforation or color different than single stamps
S	Sheetlet (up to 10 stamps), when stamps are printed only in this shape.
T	Sheet (pane) of stamps
X	Inserted No.
z	Label (coupon)
m	Mint main year set containing all different stamps and S/S.
mA	Additional year set (usually definitives with some difference than previous issues)
mB	Additional year set, containing all partly imperf stamps or pairs from booklets
mK	Additional year set, containing all booklets
mRM	Additional year  set, containing all RM sheetlets (Michel=BL)
mR	Additional year  set, containing all R (special sheetlets)
mN	Additional year set, containing all imperforated stamps and S/S