But definitly we bought 4 GTA doors 1981 and they had the inner parts for the new window slider!!!! we realised about 30 years later , when we took one of them to restore an GTA!!!
This falls into the FIA 100 car alloy door option in 1970!
a part of the Alfa Romeo 1750GT Am FIA Groupo 2 Turismo in 1969 with 1000es, which means that 1000 examples were made, regardless of how many were converted to 'full specs' as the majority of collection of parts were listed as options, so allowed under the FIA rules. So 1st October 1969 for FIA homologation no. 1576, then the revision homologation no. 1576/3/2V Grouppo 2 Turismo 1000 Date: 1st Jan 1970, see the document below.
24: Materiale: Alluminio 105.31.55.042.00 and 043.00 are the GTA doors it's authorised to use.
26: Cofano baule in alluminio 105.32.56.031 the GTA bootlid it's authorised to use.
unfortunately no aluminum bonnet spelt out,
cofano motors in plastica 105.51.56.030.10