I am selling an original Mazda fitted Mitsubishi A5T03677 60 amp alternator,  as fitted to most early MK1 / Eunos 1.6 cars 1989 - 1998.
This one is very clean and will be supplied with a Twelve Month Guarantee.
The Alternator has been dismantled, cleaned up and fully checked and tested on our 1991 Eunos, please see last photo for charge voltage. 
It has been fitted with new brushes. I will include the original Mitsubishi brushes - please see last fifth photo, these really did not need replacing as probably 70 - 80% of original length.
I would think that an original Mitsubishi alternator would be £400 - 500, if available new today; certainly that is what the Inferior MK2 style Hitachi Alternators cost new.    
Please see my other MX5 listings.