Microsoft MS-DOS 3.06 [ACT Apricot]
Released in 1984 by Microsoft / Apricot
For Apricot PC/Xi computers

IMPORTANT: This disk will ONLY work on an Apricot PC/Xi computer. It
will not work on an IBM PC or emulator. The Apricot computer is not
IBM PC hardware compatible.

IMPORTANT: This disk is in a unique early 3.5" format and is not
fully readable by DOS or tools like WinImage.

Note: This is not a complete MS-DOS system disk. This is a network
workstation boot disk, and lacks the DOS utilities.

Includes one SSDD 320K (1 side, 70 tracks, 9 sectors of 512 bytes) 
disk image in Apridisk and ImgDisk format.

Source: http://actapricot.org/disks/aprid5ks.htm

Label:

apricot
Point 32
SERIAL NUMBER: 0000000059
APRICOT PC/Xi
WORKSTATION
DISK B Vr1.1
13th December, 1984
UK Version