If you order a new key from MB, it should come as the 95-97 style
which has the smaller case and keychain loop. Those early 91 to
94 style keys are no longer available, so you will get the newer
style.
The early keys chip board and batteries won't fit in a later key case.
*****Disclaimer***** If you order a new key and the Baltimore
Key Warehouse finds an old school key siting on a shelf, you may
still get the old style. That being said, I am exempt from any voo-doo curses or punishment if that happens.
Good luck.
DR.D