HOME 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
 

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