The first of these is particularly interesting- Les Compagnons. I have owned it for years in my playable collection. I have always thought it was a Monogram design, by the design company Monogram. And it might be. But the last time I played it, I realized that the font was not a font, but was hand-drawn. Which means Steinweiss probably lettered it. Which means he might have designed it as well.
The rest of them range from signed Piedra Blanca to total guesswork.
Collecting Record Covers 