Machine Cancel Study Group

The Machine Cancel Study Group is now posting past issues of its newsletter online. The study group website is at http://charleslivermore.com/machinecancels/

Illustrated here is a Robert Co., Montreal, Perfect machine strike. Perfect machine cancels are differentiated from Universal machine strikes by the space between the circular date hub and the obliterator bars.

A "blank" time mark, such as shown on this Melfort, SK, Klussendorf strike suggests a single, daily mail clearing time.