The computer
The SECAM Atari 600XL was announced but never produced; the SECAM Atari 800XL was the only model available in France. Unlike the PERITEL Atari 800, the video signal available on the PERITEL/SCART connector of the SECAM Atari 800XL is not limited to 8 but to 128 colours.
This SECAM model available in Q4 1984 drastically reduced the total cost of owner ship, compared to a PAL Atari 800XL with RGB video converter.
The connectors
PAL vs. SECAM versions
Inside the machine
PEEK identification
Using 'PEEK' commands in BASIC to find out about the OS, Basic and GTIA versions.
For your information, the results are:
PEEK(53268) = 1 [PAL/SECAM]
PEEK(65528) = 140 [Not a 400/800]
PEEK(65527) = 2 [XL OS Rev. 2, 1983-05-10, 800XL(most)/65XE(most)/130XE(most)]
PEEK(43234) = 234 [Atari BASIC Rev. C]