One of the club's members (thanks JohnP) has researched and decoded the VIN sequence. If your van pre-dates the 'VIN' system then sorry, decoding these is still a work in progress but you can look at the dateline put together by Christiaan Here
If you use Facebook you can also check out the Esterel brochures (1979 & 1991) which are in the 'Files' section of the club's page Here
Vehicle Identification Number (VIN) is an international standard for vehicles. The VIN can be found with other info. on a metal plate on the left side of the caravan's 'A' frame ('A' Frame - the bit of the chassis between the body of the van and the tow-hitch). It is also stamped into the right side of the 'A' frame but may be a little harder to read under the paint.
For example: VFMCAC31NJE000351
* 'VFM' identifies the van as being made in France by Esterel.
* 'CAC31' is Esterel's model identification.
* N (or L or U). Denotes the internal seating/bed layout.
* J is the year of manufacture, (J = 1988).
* E is the manufacturer's assembly plant code.
* 000351 is this Esterel's unique 'chassis number'.
CC, C, CAC, CA for Caramatic models
TV for Top Volume Models (TU was also used but only for the Caramatic TU34)
SG, SGE for Slimline (Sillge) Models
S, SU for Supermatic models
These letter combinations are followed by 2 numbers which denote the body length (not overall length) in metres e.g. 31 = 3.1 metres
If the letter T appears after body length then your van should have a toilet compartment.
Date Codes: A = 1980 (Used only in USA ?), B = 1981, C = 1982, Etc ...............Y = 2000, then 1 = 2001, 2 = 2002, 3 = 2003, 4 = 2004 (Production ceased).