The Erla 5A flying as X-HB-SEX - a Swiss provisional Permit to Fly was granted in August 1968.

The only surviving Erla 5A HB-SEX built in 1934 seen over Simmenthal Switzerland on April 1984.

Erich Gandet’s recent photograph of the same aircraft in company with Roesgen EPR.301 HB-OIX, also based at Birrfeld.