It's a 'blade' for the inside (pole piece) of a guitar blade pickup,
33mm long? where did the other 2 strings go?

For looks I think ground would be best, but then again gutiarists being the funny lot hey are you will probably have to have the option of chromed, black chrome, polished steel, ground and nasty gold plated.

I've cut 1.5mm in a guillotine before, not sure I would want to do it a 1000 times tho, if its 20 or so for R&D then no prob, also leave shear marks on the edge so would still need finnishing. since its for a production run you will probably be best getting a quote from a fabrication company.