Like B315, but instead of the bank initials embossed on the silvery round patch on the front, the initials are printed; and the note is lithographed front and back. Furthermore, new date and new printer imprint (GIESECKE & DEVRIENT MUNICH). Imprint is in lower right corner on the back, below the denomination. It’s hard to read without a magnifying glass.
Courtesy of Rui Manuel Palhares.