All my favorite commercials with pinup girls from the 1940s and 1950s revolves swim suits from Jantzen! It's not easy to find fresh vintage swim wear and I have never got my hands on this brand before. You can imagen I was excited when I found this beautiful thing! The fabric is mostly cotton so it's easy to wear it as a jumpsuit as well.
Jantzen started in 1916 in the US and was extremly popular. The famous pinup artist George Petty illustrated the commercials and they used a lot of famous models like Suzy Parker.
If you want to see some Jantzen commercials just search on the net and you will find a lot of stunning pieces!