Off the top of my head;
1975/76 white kit dropped. Blue and white stripes return with Umbro logo.
1976/77 Bukta replace Umbro logo on shirt late on in season. Some unbranded kits as well.
1977/78 Classic blue and white kit with white sleeves and buks down sleeves
1978/79 Open collar replaces...
You can pay for it £1 a week and get Seagulls lottery tickets as well for that price. If anyone has a link, please add it to this thread.
(Personally, I buy the shirts when they are clearance items, and prefer to wear the retro items).