Here's the Siemens PG-685 MS-DOS 2.11 disk image (sector by sector, no header nor any compression in image file itself).
I hate this, if someone uses a special software for making raw disk image copies but it's not necessary (e.g. for MS-DOS disks).
If "rawwrite for Windows" is not available, use my self written DOS utility for restoring the image.

http://www.z80.eu/downloads/211PG685.zip

DOS utility using BIOS interrupts writing disk sectors:
http://www.z80.eu/downloads/disktool.zip