Hi Theo thanks for the pictures and plate info but on the colour of your car which is beautiful is it the series one metallic brown I've seen or is more of a wine colour which i haven't seen before?
The colour of my car is a very long story
but I'll try and keep it short
The colour is Lancia code 733 Bruno Mogano Metallizzato (Metallic Mahogany Brown) as used on many Lancias, Fiats and Ferraris that came out of the Pininfarina factory
https://www.google.com/search?sxsrf=ALeKk03WbfWgm0jM9MZaa6Qs0xT6VCzD7g:1586286239243&q=bruno+mogano+metallizzato.
The colour was very popular with Series 1 Gamma Coupes (and used in many of their brochures) but was also available for Series 2 cars.
When my car was being restored back in 2009-2011, I had the paint mixed by three different paint shops using computerised machines to the original formula but the colour didn't look right to me. So with a very friendly guy at a car paint mix shop in Canvey Island who said "it's all these modern water based pigments that's the problem" we came up with colour code 733G (G for 'Gilbert') The guy kept adding and mixing a bit of this and a bit of that to the formula while I was looking at the paint and the old fuel filler flap that I had with me. When I thought the colour was right, I said "STOP" and that's the colour my car was painted with. The final result has slightly less yellow tint than the original and slightly more deep red. It changes a lot under different light conditions. Some times it looks very red and other times looks a yellow-brown. One of my friends has called the colour "Metallic Bacon"
I think I know the deeper red 'wine colour' you mention which was popular with the Lancia Delta. There is a Gamma Coupe in that colour and it's more red than mine as you can see from the photos below.