The 85 issues from before this gap, called first series issues, were more widely distributed within fandom, and today often show  on eBay. First series issues started at 6 to 10 pages, but by the 1970s had grown to between 48 (January 1971) and 159 (May 1971) pages.
The 85 issues before a break in publication, known as first series issues, were more widely distributed among fans, and are frequently found on eBay today. These early issues ranged from 6 to 10 pages long but by the 1970s they had expanded to between 48 (January 1971) and 159 (May 1971) pages.