My production matrix for the Dietz Monarch is now available to collectors. Just send me an email, Subject: Monarch, and I will fire you back a copy.
The Monarch is the most datable lantern due to it's numerous and sometimes subtle changes that resulted in over 30 versions in it's 57 year domestic production history. With the matrix a collector can date a Monarch based entirely on the physical features. The matrix will eventually be a download at lanternnet once I complete a photo appendix for the website version. BB