Luxury Jaeger-LeCoultre’s new Polaris Chronograph — one of the standout models from this year’s all-new Polaris collection, inspired by the classic Memovox Polaris divers’ alarm watch from 1968 — is emphatically among the latter. The case: At 42 mm in diameter and a svelte 11.9 mm thick, the stainless steel case features predominantly satin finishing,…