Issue 01b is currently not available here
Issue 01 was revised in November 1992 and became Issue 01B. That was an expanded edition, with extra pages, better printing quality and additional information added. The front cover design was identical to the original issue but a new back cover graphic was added.
If you have this edition and are able to do good quality scans of its pages, that could then be included here, then please do get in touch.