Ludwig drums are available in sizes 6″–26″ and in a variety of graduated depths.Classic Maple drums are a versatile choice for any performance application.
These clip mounts were featured as early as ’68, but became more evident in the 1970’s.
In 1979, Ludwig introduced modular bracket and the redesigned blue/olive badge with all four corners rounded.
Maple shells feature high sensitivity, wide dynamic tuning range, and a sharp attack, making them an especially good choice for live performance, but Ludwig crafts the Classic Maple’s 7 ply North American maple shell to respond to the player and environment quickly, making it adaptable to any playing style, preference, or location.
Each Classic Maple drum’s bearing edge is cut to a 45-degree angle within 1/16″ from the outside edge.
But by 1976, their method of construction for drums had changed drastically. Shells now consisted of 6-ply maple/poplar mix without reinforcement rings.
All shell interiors were now done as a clear coat, exposing the grain of the wood.
Weather Master Heads feature Ludwig’s exclusive “Headlock” system and a low-profile collar, providing for even tuning and superior durability.
The 1970’s are referred to as the era of the Blue/Olive badge.
Gier's "Serial Number Based Dating Guides for Vintage Ludwig Drums".
Not knocking Cook's book or any of the other lists but this is an eye opener,especially for 70's drums.
Here are the three different bass drum mounts used throughout the 70’s- in order from earliest to newest.