It's a free reference for drummers and collectors alike.
You can find the varying catalog outfits offered by Ludwig during its proper era, as well as some background information to their designs and history.
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.
A future significance in chronologically cataloging a product produced by Ludwig wasn't foreseen.
The most accurate way to dating a drum is to see it as a whole, and assess every aspect of the drum.
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.
The Acrolite used the same Shell material, and was built using the same process & equipment as the Supra Phonic 400 with the only difference between the two being that the 400 was drilled for ten Lugs and was chrome plated with the 404 getting eight Lugs and having an Anodized finish.
I will also be adding some information “along the way” based on things I learned while reconditioning both Acrolites & Supra-Phonics.