The symbols to the **left** of the BB cover (“technical”) are divided into 3 categories:

- A letter denoting the EMC employee responsible for the final “smoothing” of the frame before painting (A,B,F,G,M,P,T,D,Y,L,N,J,S,H,K, unusual 0, ^)
- A number indicating the length of the seat tube in cm measured c-c (for example 2 means 52 or 62, 8 means 48 or 58)
- Letters indicating tube type, geometry or model:
**R**= Reynolds 531**C**= Corsa**X**= SLX/SPX**CX**= Criterium**TT**= TSX**M**= Strada (Matrix/Cromor)**TTB**= Century TSX**XB**= Corsa Extra SLX century geo**WW**= Strada since 1992

The symbols to the **right** of the BB cover (“statistical”) form a serial number, it consists of a letter and a set of digits. A letter means another series of frames, a number is another frame in the series (001-9999). The exception is the production from 1980 (there is no letter, and in the prototypes even digits, and there are just over 1000 of them).**E** – 1981-1984**Z** – 1984-1986**A** – 1986-1988**B** – 1988-1990**C** – 1990-1991**D** – 1992-1993**F** – 1994-1995**G** – 1996-1998**H** – 1998-2000**J** – 2001-2002**K** – 2002-2004**L** – 2004-2006**P** – 2006-2008

In addition to such markings, there are unusual ones:**CS** – Capri Sonne**ED** – Europ Decor**W** – Winning ?**KE** – Kelme**HL186P** – Hans Lubberding 1986 Pista (Panasonic) and similar – his teammates

## Model Weight Chart

## References:

https://www.retrobike.co.uk/threads/eddy-merckx-decoding-for-everyone.410031/