Well it was undoubtedly a CKD car assembled in Portugal, but it has a VIN not in the CKD VIN range that I know of.
1600-2 model pre 71 ('68, '69 & '70) VIN 1060001 to 1061683
1600-2 model 71 ('71, '72 & '73) VIN 1085001 to 1088478
1602 model 73 ('73, '74 & '75) VIN 2890001 to 2892913
So, 1063700 is a mystery.
Is the VIN plate like the picture below?