I am looking for advice and opinion regarding the oil tank on an early 69S that I am restoring. The Kardex states 10/68 as first registered

The question relates to the fittings on the tank, I originally considered it to be a replacement with a Sporto tank being fitted, but would like opinion if anyone else has similar or knows about this detail
It has been discussed that replacement tanks had the fittings installed and were suitable for both models

My feeling is that it is original, as the car was stored for a lengthy period of its life, and is still low mileage. Most of the other parts of the car are original having been identified by the dating stamps and markings

The sender unit is probably original, but that could have been swapped with a tank change