There's an Authi group on Facebook . Lots of information and some parts. I still have some parts from my 69 Mk2 Authi .
https://m.facebook.com/search/top/?q=authi mini register group&tsid=0.3003008804712455&source=result

Sorry to highjack this thread, but would you have any Authi badges by any chance? also, I might be interested in the grille,
cheers,
Abel

Scum:  What parts in particular are different or additional in the Authi's so I'll know what to look for?  Do you know how I can tell an Authi 848 cc engine from the 998cc engine without taking it apart?  Don't know what parts I will need yet but I'll keep you in mind.  Thanks, J.D.

I owned a 1275 Authi and a few Innos. In some ways they are more similar to an Innocenti Export 1275 than a regular UK Mini.  Authis have a few rare bits on them though.  I have a few parts including egg crate grills if you need one.

Thanks for the info Abel; will try to post a couple of pictures after it gets here.  J.D.

Congratulations on your purchase. It would be interesting to see any pictures of your Authi. I remember seeing them growing up in Spain.
If you need any assistance translating any of the documents, let me know.
The logical place to ask for advise would be this Spanish site //www.foromini.minibcn.net/ ..... I would assume that somebody will be able to help you here, even with broken English ,
cheers,
Abel

Tomorrow is delivery day and then the process begins.  Hope to hear from other Authi owners.

News to me.

Aside from the speedometer, what parts have you found are metric on Innocenti minis that aren't metric on British minis?

There must be an Authi group somewhere but you might want to begin to document what does and doesn't fit from a British mini. There could be a book(let) in it for others.

First off, I"m going to guess there's mostly metric instead of SAE. The Innocenti is metric so that too might be an alternate source for some stuff.

Just purchased a 1975 Authi 850L (ADO 20) and I'm trying to figure out what the primary differences are from the British version so I don't end up buying new parts that won't fit.  Have purchased several books but they devote little space to the Authi model, especially the 850 version.  I also don't read, write or speak Spanish so that is a hindrance.  Any assistance would be appreciated!  J.D.