You'll have to pony-up for Mitutoyo if you want Tstr Approved calipers, but these received a Cursory Nod for using the commonly available CR2032, rather than the LR44 usually found in <£10 precision instruments.
those -appear- to be the same as the callipers i got at Aldi a while ago (not sure if the internals are the same though). For £8 they've been pretty useful and, as far as i can tell, accurate.
Out. Fucking. Rageous.
You'll have to pony-up for Mitutoyo if you want Tstr Approved calipers, but these received a Cursory Nod for using the commonly available CR2032, rather than the LR44 usually found in <£10 precision instruments.