Datsun 1200 windshield fits like most other from 60s -- no more difficult to remove than a Ford or GM windshield that uses the same type of rubber.

The glass shops like to reuse the old seal, they don't like new seals. They work the glass out by using a soaped thin cord. They break a lot of windshields this way but then they are putting in a one.

For saving the windshield, cut the rubber thouroughly, then ease the glass out.