And this information came up on an old Ebay search .............tis interesting stuff
Rare Promotional Vintage Corgi Rover 3500 SD1 & Speedboat on Trailer . Condition is Used. Dispatched with Royal Mail 2nd Class.
This was a promotional diecast set produced for the Walsall Lithographic Company who, late 70s early 80s, sponsored a powerboat team. The set also comes with the promotional drinks coasters.
The company produced transfers and stickers for Corgi, hence, the promotional sets that only went to staff of the company. A parent of mine was one of them.
As a promotional item, the set never came in a printed retail type box but rather the clear plastic display one in the photos. This box is showing signs of wear.
I never played with the set ,however, as the box testifies I removed it to look at plenty of times.
The car, boat and trailer are in near mint condition. The car has the same moving parts as the retail version and the powerboat has a movable rear engine.
I've never seen the powerboat as part of any commercial sets and is all plastic. The car/trailer are all metal. The set is made in England.
https://www.ebay.com/itm/Rare-Promotion ... 7675.l2557