Paul Elvstrom, who, for my generation, is the greatest racing sailor of all time, introduced this dinghy in the 1960's. About the same size and weight as the Philip Rhode's cat-rigged dinghy, the Penguin , it obviously had nowhere near the popularity of the Penguin - in fact I have never, in all my travels, come across this dinghy. It remains a ghost, an entry, 50-odd years ago, in the One Design and Offshore Yachtsman's magazine annual review of dinghies, nothing more. It would be very interesting if a reader could direct me to an extant example of an Elvstrom Junior.
[Update: 05/06/17] After this post had been up for six months, Mike Scott came across an ad for the Elvstrom Jr. that was posted on Facebook. I've chunked the ad into four pieces.
This photo of the Jr. car-topped on a Beetle shows clearly the outside buoyancy tanks.
Similar in size and weight to the Elvstrom Junior, the American Philip Rhodes Penguin (from this post).
Bald but my eyebrows are growing at a prolific rate. Sailed Windmills and Y-Flyers in the 1960's. Founded Miami University (OH) sailing team. Sailed International 14's and Lasers in the 1970's. Sailed International Canoes in the 1980's to mid 1990's. Sailed Classic Moths since 2002. Enjoy boatbuilding though I'm very, very slow at it (the Internet doesn't help matters). Name in real life: Rod Mincher
After choosing this username (Tweezer is the name of my Classic Moth), further research on the Internet turned up that Tweezerman is a corporate name for a line of pedicure products. Let me emphasize that I do not work for, nor endorse these products.