Nomenclature
Grading (commencing in the 1980s, in ascending order):
CC, CB,
CA, BC, BB, BA, AC, AB, AA, C, B, A, A0, A1, A2 etc.
Era-specific markings:
1972 – 1975
two white spots on the side of the stem; shank stamp: ‘BARBI'
1975 – 1981
Stem stamp ‘RBarbi' in gold; shank stamp: ‘styled
by barbi'
From 1981
Relief ‘RB' logo on the stem; oval shank stamp: ‘r.barbi
handarbeit'
Date codes:
From around 1987 - 1992
two to three digit date stamp, e.g. ‘78'
= July, 1988
From around 1992 - 1997
4 character alphabetic stamp for the production
date (month and year), details are currently not available
From 1997
Fixed
alphabetic codes for the production date. The month codes are
in descending order from z to m, with ‘z' standing
for January and ‘m' for December: Z,Y,X,W,V,U,T,S,R,P,N,M. The
year codes are in ascending order from A (for 1997), B (1998) etc.
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