So this seller is convinced these drums are 1962. The photos are dark but I can clearly see that the paper tag on the interior is the small rectangular post 1972 tags. Looks like memory lock mounts ( although I'm not that familiar with that hardware) These are large drums , 18" and 20" floor, but the seller is sure the script logos are the "backwards" type hence his 62 claim. Oh well....
http://www.ebay.com/itm/251231765632?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649