The web site link is available so feel free to visit their web sites and learn more.
What you might not know if you are new to vintage drums is that manufactureres did not keep accurate records and inventory control was not part of the daily operations of drum making.
One day a box of drum badges could turn up or in many cases new serial number badges were put on top of older serial number badges making it difficult for us today to know exactly when the drum was made.
I get emails all of the time with a basic drum description and a serial number from visitors in hopes I can unlock the history of their drum.
I think in general serial numbers do play an important role in the commercial market especially electronics and other high end items.
These catalogs although re-printed in some cases from year to year with limited changes do provide a timeline of when finishes were added and when hardware was used and or changed on drums.
Unfortunately still there is no exact science or way to pinpoint an exact date of a drums manufacture.
In most cases the best way to estimate the date of a drum is its physical characteristics.
Fortunately drum companies since the 40's were good at printing catalogs.
This web site is connected to a large drum forum related to vintage drums where you could do even more research and or become a member to ask qeustions and learn from people that have been collecting for many years.
The Vintage Drum Forum can be found by clicking here.
As collectors and historians we have to settle for a date range or a specific year at best.