It might well have come with dealer fobs, rather than a Maserati factory fobs. That’s certainly my experience when I bought cars such as the Ghibli Cup, QP IV, 3200 and 4200 back when they were current. Maserati hadn’t fully embraced the whole branding/merchandise thing back then.
As examples I still have Maserati Meridien Modena, Maserati HR Owen, Maserati Graypaul and Maserati Brundle key fobs.