It is the Meisterstück Stylo number 30, made between 1930/31 and 1934; the barrel number 30 refers to the then retail price of 30 Reichsmark. From the factory the model was originally not a fountain pen with nib but a push filler with stylo tip, to which the patent number mentioned unambiguously points. Often the black front part with the stylo tip was subsequently exchanged for a grip section with nib. On the green-marbled celluloid housings, discolourations as well as material shrinkages additionally often occur.