The first PC I ever owned was the ICL DRS PWS 300 as described in this press release. It was originally supplied with a copy of multitasking MS-DOS 4.1 (and Windows 1.0, which isn't mentioned in the press release). I bought it second hand and the original owner had replaced the OS with DOS 3.1 and Windows 3.0 (downgrading the DOS version because of compatibility issues), but the original disks were included. I never used them, and no longer have them.
Over time, I've wondered what using the system in its original state would have been like. I've been able to find images of Windows 1.0 to use in emulators, but have never found MS-DOS 4.1. Are there any known copies of it, or has this been lost?