355 Is this a factory interior?

The pattern looks original. The colour may be Bordeaux or Rosso

Here are some of the Ferrari leather colours of that era with colour codes

https://www.ferrarichat.com/forum/threads/fob-and-leather-colors-for-3-fob-ferraris.570777/

Try searching Eurospares or a similar site for the seat part number with the two digit colour code suffix.
Bordeaux: 25
Rosso: 30

 

Bordeaux seems to work in Google search “Ferrari [seat part number]25”

 

Arguably it's a Ferrari, you can get whatever you want...

That's interior is freaking awesome btw...

sjd

 

If there’s no way to know, there’s no way to know. (If you’re concerned about resale)

 

Any more pics? that interior looks crazy good...

 

Yeah I want to see that entire interior. Red and black is amazing.

 

Good point. The handbrake lever usually matches, too. What is the general overall condition of the leather. Any visible bolster wear? Maybe it's a re-dye?

 

Looks like candy red....

 

My gut is that it isn't original. You can ask your dealer to run a MODIS search and see what the car was specc'ed with when it was new.

 

Original, my car is silver with bordeaux interior. The doors are red and black. Center console black,, will take some photos when time permits if needed?

 

Is this your car in the OP? Don't you think the leather looks to be too bright to be bordeaux?

 

Bordeaux is not red but more burgundy. This is red red.

 

No not my car but similar, black and Bordeaux. Might be the lighting or where the photo was shot and with what equipment, or if the interior was redone they picked the wrong color.... But I have seen some reds on F cars that were bright, not like a bordeaux interior.

 

Like both of mine.
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The color is Rosso as it is brighter than Bordeaux.

 

I am considering recolor my interior like above, I have a green interior, very special but kinda odd.

Your suggestions appreciated to keep it green or recolor the whole thing?

 

More pics of the red interior. I'd say the seats are not original to the car, but original red leather.

 

I’d LOVE to see more, because that one pic alone is jaw dropping. Such a nice job putting in the accented floor mats. Just brilliant.

 

That is beautiful, I would definitely keep that color interior (green), It's not the typical, Tan or Black. Very different.

 

Please absolutely DO NOT recolor that interior. Green is super rare and it would be a crime. It also happens to be super cool.

 

OMG keep it green and original. Hands down.

 

Agreed with the other comments: DO NOT CHANGE! This is super cool and super rare. You have a gem. Appreciate it