I bought a used or new-old-stock (NOS) Telesar via eBay a few months back. It's clearly a 1970s refugee, with a claim of being "computerized" (because of the mechanical counter, no doubt) and cheesy "computer" font on the box. I believe it's an earlier version of what Jessops, Freestyle, Adorama, and others are selling today; it's got the same layout and features, but some styling details differ.
In any event, when I roll film such that the roll counter moves one full turn (start to start, or however it's labelled), I get the equivalent of what would be called a 34-exposure roll if it were factory-rolled. This means I get 34 or 35 exposures on a motor-drive camera such as my Ricoh XR-X 3PF and an extra frame or two if I use a manual-wind camera and start shooting on or before frame "0," according to the frame counter.
Unfortunately, my loader has a serious problem: It scratches film. The design is such that the film is drawn, emulsion side down, across a curved plastic part inside the loader. The scratching problem seems intermittent and light with the first bulk roll I tried (Kodak T-Max 100), but much worse with the second bulk roll (Fomapan 200). Fortunately, for the second roll I did a couple of rolls and tested them in a couple of cameras, so I spotted the problem and could move the film to another bulk loader without ruining it all. I don't know if the problem is caused by a bit of dust, an imperfection in the plastic, or something else, but I no longer trust this bulk loader, which is a pity, since I like the film-remaining counter concept that seems to be unique to this design.