Indeed the later Mk3 do start to show more pointed hands. If your Mk3 came with the pointed hands originally, I believe the only possibility would be that it is in the 231+ serial range. Is that correct?
A guess given the data on my site is that Zenith ran out of the thick hands and swapped over to the service hands at the very end of their production of the A386. Or, perhaps they decided to cut over to pointed hands intentionally at the very end of the A386 production run, though to me seems less likely.
http://alphahands.com/faq/zenith-a386-sub-register-hands/Click to expand...