I was wondering how to tell the difference between hub and machine doubling? Also what other errors besides the obvious ones (off-set, clipped planchette wrong planchette ect.) are considered collectible?
http://www.doubleddie.com/58222.html Scroll down to Machine Doubling, http://www.error-ref.com/index-of-entries/ Just like most hobbies there is a High End and a Low End but its all collectible. Some are for the knowledge, some for the money and some for the status.
Thanks for the the site I'll check it out. Reference material is always appreciated I need all the help I can get. "Learning something new every day"