Tenorel was a brand apparently marketed out of the Netherlands (I know Richard says "Poland" but see below). Almost certainly the cartridges themselves were actually sourced from the Orient. Their top-line cartridge, the Tenorel MF-100, was identical to the Astatic MF-100 made in Japan and sold in the USA. I don't remember who made it; possibly Nagaoka. Whether Tenorel and Astatic, the MF-100 was quite highly regarded; the Terorel T2001 models were a lower-priced line but were similar in appearance. Astatic also sold lower priced MF series cartridges, theirs going down in price as the model number got higher: high to low, MF-200, MF-300, MF-400.
Interestingly the Tenorel line had the same number of models as Astatic, with the MF-100 at the top and the T2001S (Shibata tip), T2001ED (elliptical) and T2001D (spherical tip) downwards. I can't find enough photographs from matching angles to determine whether the T2001 models were the same as the lower-priced Astatics (note: this includes only the Astatic magnetic cartridges; there were dozens of Astatic crystal and ceramic cartridges, not under discussion here).
As if to confuse matters more (here's where the "Netherlands" reference comes from), here is an excerpt from Gramophone, November 1975:
Extended Tenorel range
Following the launch earlier this year of the Dutch Tenorel T2001
stereo magnetic cartridge, two new versions have been added to the
range. The T2001ED has a nude elliptical diamond stylus for playing
at 1-2.5 grams and costs £13 12 (incl. VAT). The T2001SD is fitted
with a nude Shibata stylus and costs £21-87 (incl. VAT). The original
T2001 now costs £6 -81 (incl. VAT) and can be upgraded within the
range by a simple change of stylus. All models weigh 7 grams and
carry a two-year guarantee.
Goldring apparently also imported these same cartridges under its own name, and several British
radiogram manufacturers (the most well-known being Ferguson) used these cartridges in the turntables
they supplied; as did Garrard in one of their British models (the Garrard 630) supplied with cartridge.
The Astatic MF-100 got excellent critical acclaim in the hi-fi press (for what that's worth) when it was introduced;
but there is only silence about their lesser models, as is typical with stereo/hi-fi magazines to the present day.
There is a Consumer Reports article in which the Astatic MF-200 was tested and rated. It is posted in the
Cartridges section with some comments about the Astatic MF-200 following it.