Today, I received an eBay win of a model that I have not collected before, the 310 TEL. (Pix 1) The 310 TEL appears to be a current model, as it is listed on the Triplett/Jewell website*.
The 310 TEL is a 20k/5k ohms per volt DC/AC like the standard 310 model but has a polarity reverse switch, normally seen on only the 310C. In addition, the Higher voltage receptacles (normally 600 or 1200v) have been plugged, so the highest range is only 300v AC or DC. While it retains the attachment point for the Amp-Clamp probe, the extra meter scales have been eliminated. I am assuming that this is a "stripped down" model aimed at the telephone industry. The label on the back tells a sad story (Pix 2).
*link to website (not affiliated)
http://www.triplett.com/product_info...roducts_id=101
jr