7J x17 H2 (ET45) so same as original I think. Some sites say specifically that they fit the Abarth and the OP has brembos so I think it's fair to say they fit OK. They are meant to mimic the style of the original 13" Cromodora CD30 but the "spokes" on the "Historical" wheels splay out towards the outer rim whereas the original CD30 had straight/parallel edge "spokes". But if the price is right, why not!
??? AHHHHHHH!!!!!! Gawd I want those wheels!!! Those are factory option Spider Europa Euro-only wheels, ready to fit on your Euro-only Spider. They can't be imported into the USA for lack of US-DOT approval. Well, I'll clarify "can't", I don't want to be the one to try to import them only to somehow lose them in Customs because they aren't DOT approved. Some Euro sellers won't guarantee they'll be able to get them through to me, and others flat-out refuse to try. USA 3rd-party parts suppliers I've talked to (incl. one active on this board) aren't willing to sell them due to this issue. Here's the Fiat link about the car they appeared on- https://www.fiat.com/124-spider-europa#
They appear in the Fiat Euro accessories catalog, and they can also be had through Euro parts suppliers, such as Glyn Hopkin in the UK.
Measurements: 7Jx17 H2 (ET45). Composed of x4 alloy wheels PN: 52064513. Centre caps x4 included. Note: To be fitted in-combination with 205/45 R17 84W tyres (not included). Important: Special Order item only, see our Delivery & Returns for more information. Please allow 7-10 days before dispatch.