The Snappy fingertip ratchet would be a TMR860. I had one and never really liked it. The thing had too much back drag in the ratcheting mechanism. I now have SK fingertip ratchets in both 1/4 and 3/8 drive. The SKs are smooth as silk.
No that is not a TMR860.
It is a TMR739 which is discontinued , the TMR860 replaced it.
All the Snap On 700 series 1/4" drive round head ratchets were 39 tooth and the mechanism was held in place by a clip on the drive side.
The Snap On 800 series 1/4" drive round head ratchets are 60 tooth and the mechanism is held in place by a screw in the center of the selector.
The 800 series is currently being replaced by the new 72 tooth models, the TMR860 is the only 60 tooth ratchet still available .