The M-1 mouse from Contriver Technology, Inc. came with graphic utility software for the Commodore 64 and 128 on 5-1/4" disks. Its DE-9 socket plug connects to the joystick port.
Silver label on the M-1:
Q.C. PADD MADE IN TAIWAN SER NO: 052106
Packaging for the Contriver M-1 mouse.
"Includes user friendly software:
Contriver Technology Inc."
For the best performance please try M-1 Mouse 1st.
*For top window text open & creating
*Adjustable mouse speed
*Calculator & terminal function
*File copy, scratch, rename, browse"
"Also recommand (sic) use with any software that currently use joystick or mouse as controller such as GEOS, DOODLE, etc."
The M-2 mouse from Contriver Technology, Inc. for the Commodore has three buttons whose scoops feel delightful to the fingers. Judging from the FCC ID, this mouse was produced in 1988 or before. The FCC completion date sometimes lagged behind production.
Label on the M-2:
Contriver Technology Inc (U.S.A.) FCC ID: FYA4PV1988 MADE IN TAIWAN SER No: 8811271