Posted By:
Dave HornishPaul-It was a 1970 Seaver? If memory serves (since I am not at home) Seaver is #300 in the 1970 set and I'm not sure he could be included in the cloth test issue referenced here. This seems like it's worth investigating though; it could mean Topps did a second cloth test with the 3rd series cards.
This is why I enjoy making these long posts on obscure sets-you never know what information will turn up. Already we have 22 confirmed 70 Cloth cards, which fits a known Topps pattern and there may be more to come. To quote Arte Johnson "ver-ry inter-esting!"
Also, a 66 card half sheet (technically 1/4 of a full press sheet) seems to be a popular size for uncut proof issues. This too is worthy of more study but definitely in another thread.