Baseline Pinch Gauge 60lbs £70 (140+ new) and a Baseline Pneumatic grip gauge 15lbs £20 (80 new).
Physio grade pinch gauge come with original case. This is great fun to own but probably better suited to climbers more dedicated to actually increasing their grip and having accurate progression measurement. There's also a Baseline Pneumatic grip gauge 15 lbs - easy to max out but fun to see how long you can sustain it! The pneumatic one has no case but is still fully working an excellent physio kit. £5 postage. Happy for either to be picked up from Notts or to combine postage. Both are on FB marketplace so a search will bring up the pics!