Wahl TM Series meters ( TM612 and TM630) underwent a product line upgrade in 2016 that changed the standard connector on these meters.
The original meters (part numbers TM612 an TM630) are dark gray and blue, with a light gray protective rubber boot. They feature a M8x1, 4 pin connector.
![](https://www.palmerwahl.com/wp-content/uploads/2024/02/TM612_Connector-300x153.jpg)
The current meters (part numbers TM612A an TM630A) are white, with a dark blue protective rubber boot. They feature a Lemo 4 pin connector
![](https://www.palmerwahl.com/wp-content/uploads/2024/02/TM612A_Connector-300x157.jpg)