You Do Need power plug adapter while traveling from Sint Eustatius to San Marino.

Here is Why You Need An Adapter

The outlet and plug type used in San Marino are C, F and L and in Sint Eustatius are A, B, C and F. This is how they look like.

Sint Eustatius

In Sint Eustatius, outlets of type A, B, C and F are in use.

Type A

Type B

Type C

Type F

San Marino

In San Marino, outlets of type C, F and L are in use.

Type C

Type F

Type L