based on car# 16907 in the VIN database your cars build date should be 3/73 and your chassis # could be 1139565 but history shows they didnt always roll off in numerical order. look in the rear trunk, right corner for the stamping in the the floor pan to confirm. It looks like maybe Bahia red L30E from your picture. check the Karman plate on the drivers forward door sill. You can order a COA
http://www.porsche.com/usa/accessoriesands...ofauthenticity/ Gather all that info and add it to the VIN database please.
Goodluck!!!