FYI.
From the examination of provided dumps, it's been found that technically speaking, there is a very very slim chance of compatibility on Minver 3.60. It would appear that some rare models (datecode 1B iirc} still use metldr v1 & can be jailbroken with the no-fsm patch (also used by ps3xploit) in the same way as consoles on Minver 3.56.
It's an exception rather than the rule though & the only way to know for sure is to dump the NOR & examine its content to find out whether the console uses metldr or metldr2.