There are at leat two recorded patterns of a Seahouses Gansey and both of these are shown below.
You can find out all about the different ganseys around the coast, their patterns, constructions and histories from Flamborough Marine who have an excellent website here.
You can also order Ganseys and make your own by obtaining knitting kits from their website. The price of the kit depends on the size being ordered. These include towns such as Newbiggin, Cullercoats, Whitby and Filey and many others.
Please note these are authentic hand knitted Ganseys made in the traditional manner and NOT machine produced imitations so you need to allow time between order and delivery.