The 001 doesn't have any more in common with the original 150m diver than any a Monster, Marinemaster or SKX007 does.
The famous letter to Seiko that led to the design of the shrouded watches said that the 150m watch was also too vulnerable to impact damage, as well as not being suitable for helium diving. However I don't know if this meant that the watch was more vulnerable than diving watches in general (meaning really the Sub, Omega and Blancpain at that time) or current non-shrouded models - or just more vulnerable than a shrouded high torque extra heavy duty quartz. I suspect the later.
The famous letter to Seiko that led to the design of the shrouded watches said that the 150m watch was also too vulnerable to impact damage, as well as not being suitable for helium diving. However I don't know if this meant that the watch was more vulnerable than diving watches in general (meaning really the Sub, Omega and Blancpain at that time) or current non-shrouded models - or just more vulnerable than a shrouded high torque extra heavy duty quartz. I suspect the later.
