Martin Centennial saxophones
Made 1941 - 1942, Ser# 137### - 143###) Classification: Professional
I assume this model was introduced to celebrate the invention of the saxophone by Adolph Sax 100 year ago(1843).
Hence the name Centennial which means 100 years.
They share a lot of features with the later "The Martin ____" models. A few Committee 2 features can also be found.
Fascinating is the fact that the alto models have kind of a "The Martin Alto" design and the tenor necks look more like the older Committee 2.
Also the keyguard of a the low-c tonehole is a combination between the Comm2 and the later "The Martin ___".
I think this model should be seen as a transitional model from the Committee 2 towards the "The Martin ___" range.