Need some help decoding a 1964 fender tag please

Hello guys

I try to decode a 1964 (?) Valiant Signet fender tag.


What I found so far :
Plymouth Valiant Signet, 2 dr HT, 170ci, Blue color
Light blue vinyl bucket seats
Power windows
Rear defogger
Made on Oct, 24th.
Sequence number #9314.

I couldn't decode "M3" and "T1".

Something false, or maybe something else I missed?
Nothing about transmission or plant?

:thankyou: very much
Francois