18" Lobster Forks Wheel diameter VS. 19" Lobster F
#16
As I recall the lobster fork wheels were part of the S package and could be ordered when special ordering a car or after the fact from a dealership. They came in 19x8 with a 57 offset, a 19x11 with a 67 offset and 19x11 with a 51 mm offset for the 4s. The lobster Fork wheels were also available for the same year Boxsters and Caymans in 19x8 in a 57mm offset and a 19x9.5 with a 45mm offset. The early Boxster S came with a similar looking wheels as can be see below in 18inch diameters.
These are different that what you posted, but came on this car in 2006 (19 inch Carrera S wheel option).