I picked up a freebie boat today, an older Sea King from Wards. The trailer it was on was a little shaky but it made it home.
It's the worst trailer design I've seen yet. Other than being rusty, it has little to no suspension. It has four lateral frame rails, made of super light C channel with the outer two forming the V of the trailer.
The bad part is the axle. The axle goes directly through all three frame rails, is round and is welded into the frame in the middle. The spindles bolt to the ends with four bolt flanges at the outer frame rail. The fender brackets also attach at the same four bolts via one big Y bracket. There are no springs or torsion bars at this point. The only suspension is a short 4" diameter spring at the end of each roller bunk which are clamped to the inner pair of frame rails. The boat bobs around side to side like a bobble head doll. There are shock absorbers at 45 degree angles attached to the outer rails on each end of the roller bunks. The bow stop is a huge gray rubber V block that is welded fixed. The winch is mounted on the back of the bow stop and the rope has a welded on rounded edge guide where it passed though a tube in the bow stop tubing just under the bow stop rubber.
The tires are 10 1/2 x5.80, there are no lug nuts, the hubs and rims are all one and a quick check of the bearings showed it uses 3/4" wheel bearings.
I have no idea of the maker, but I assume its as old as the boat or older.
I don't have any pics, maybe I'll get a few once I get the boat onto a better trailer. This thing is junk yard bound due to the rust if nothing else. The boat does more side to side wobbling around than up and down movement, the springs are pretty stiff but they offer no side to side support. It also only has four bunk rollers in a 5' strip. The fenders are the same as those on my later Tee Nee trailer as is the bow stop style but the winch mount on the rear is a new one as is the through the stand rope design.
It's a painted trailer, it looks to have been bright yellow or white with some red trim.