In January 1908 the following protection period for the following DRGMs was extended:

241475
242003
243380
252826

In July 1908 Carl Stiegele of München paid the extra 60 marks and extended the protection
period for DRGM 247832

So the DRGM stamped on the tubeset had to be applied for in 1905.

Kind Regards,

Raimey
rse