Not seen pictures .......
Sinbad is featured in Beeb's book Voyaging Under Power. No pics but drawings, specs and information.
Sinbad is IMO quite a bit like the Willard 36. More like a ship than most all small boats. Her listed range of less than 3000mi could be much higher if a slower speed is used. Of course that's true of any boat.
How many have been built? Being steel there won't be many. What is your interest in Sinbad? Are you drawn to her rugged looks? Most would be .. like the W36. Both boats are rugged and shiplike in appearance in a world of boats that are not. But there's very few W36 boats as well.