i couldn't find the sticker saying what model it was. but we have discovered that i have been using a 70 amp regulator in my merkur with a 90 amp alternator for about 10 years now with no ill effects. so i am thinking that the alternator in the cossie is still the original that came with it so should be a 70. and if it is a 90 then the 70 regulator should still work anyway.

thanks for the info.