The Speedboat (Husky 19) use a similar trailer that the Batboat but with small difference !

Husky trailers (gold or blue) hitch with hole are only for the Speedboat (Husky 19), the Husky trailers (gold) hitch with pin are only for the Batboat. If you find a Corgi Batmobile 1002 with an Husky trailers hitch with hole, it's not a factory assembly.

Corgi blue trailers (hitch with hole) are only for the Speedboat (Husky 19). If you find an Corgi Batmobile 1002 or E69 with a Corgi blue trailers, it's not a factory assembly.

Corgi silver trailers (hitch with hole) are for the Speedboat (Husky 19), i don't know if you can find with the Batboat.

Husky trailers, hitch with pin

1.1 - Husky Gold trailer, grey plastic wheels (from Husky 1003 Batboat),

Batboat :

1.0 "HUSKY" name molded into bottom, yellow fin with Bat labels, trailer with grey plastic wheels, hitch with pin
1.1 "HUSKY" name and "BAT BOAT" molded into bottom, "MADE IN" and "GT.BRITAIN" on rear of boat around larger exhaust tube, red fin with Bat labels, 2 figures, trailer with grey plastic wheels, hitch with pin.
1.2 "HUSKY" name and "MADE IN GT.BRITAIN" molded into bottom, "BAT" and "BOAT" on rear of boat around smaller exhaust tube, red fin with Bat labels, 2 figures, trailer with grey plastic wheels, hitch with pin.
1.3 "HUSKY" name (with "CORGI JUNIORS" label applied on) and "MADE IN GT.BRITAIN" molded into bottom, "BAT" and "BOAT" on rear of boat around smaller exhaust tube, red fin with Bat labels, 2 figures, trailer with grey plastic wheels, hitch with pin. (not confirmed
1.4 "HUSKY" name removed and "MADE IN GT.BRITAIN" molded into bottom, "BAT" and "BOAT" on rear of boat around smaller exhaust tube,red fin with Bat labels, 2 figures, trailer with grey plastic wheels, hitch with pin, "CORGI JUNIORS" label applied on trailer