I found this information regarding the Glockler Porsche.

https://columnm.com/glockler-porsche-356/
"The Glöckler Porsche 356 was a brain child of Walter Glöckler who was a motorcycle racer and a car dealer when he wasn’t racing and was based out of Frankfurt. Walter was among the very first people who adopted Porsche as a new brand and was curious about these light weight cars which inspired him to tinker and unlock full potential of these designs in the world of racing. It all begun for Walter in 1948 when the first ever Glöckler Porsche 356 was produced by the Gmünd factory, in next few years, Glöckler would make six race cars. Walter and his team further refined the Porsche model of efficiency featuring light-weight construction and a blind pass to appearances, which meant that the cars were less than 1000 pounds in weight and was built with hand-hammered aluminium panels. Being a dealer, Walter had an easy access to VW and Porsche parts and it meant that the Glöckler Porsche 356 was assembled almost entirely out of them. It was not long before these Glöckler Porsche 356 cars started winning under-1000cc races across Germany and all the time kept improving on Porsche’s factory designs.
This Glockler was quite possibly the inspiration for the 550 Porsche Spyder's."