Hamilton Twin Crown Super Compressor Diving Watch Travel This is not a quartz

This is not a quartz watch

These early Autavias feature large steel screw or snap-back cases and high-grade Valjoux manually winding chronograph movements

this particular Datejust Reference 1601 features a steel case

It was built to be a capable dive watch first and foremost

we presented our friend with some options

Hamilton Twin Crown Super Compressor Diving Watch Travel This is not a quartzSuper Compressor diving watches are a category worthy of study to any vintage sports watch enthusiast. The name refers their case design; a "compressor" system was designed to become more watertight the deeper the watch went under water. The secret was a gasket system in the case back that was compressed as the water pressure increased. Although compressor cases proved to be more complicated to make and no more effective than well designed screw