Option Group M05 on an '82 SC?

[JWW3130]

I have the original window sticker for my 1982 911SC. It lists the M05 Option Group at a price of $2705.00. I've searched the various decoding websites and can't find this option. Can anyone tell me what it is?
Thanks

[Bob Kontak]

I have struggled achieving success looking up the alpha and two numeric options codes for others.

The M plus three digit codes are the core options.

Believe spiffy interior options were bundled into the types of codes you mention.

Report if leather dash, sport seats, leather shift boot. Piping on the seats, that kind of thing.

Seems to relate to interior appointments.