For Nivada Gretchen’s latest unveiling, the independent watch has brought back a rare Antarctic GMT model from its archives.A faithful homage to the original, the new reference exudes vintage appeal, with many of its design cues being borrowed from the ’60s and ’70s. Touted by its maker as being “expedition-ready,” the timepiece arrives in an EPSA-developed watch case, which is best known for its patented “Super-Compressor” technology that leverages water pressure at depth to compress the case against its gasket.The matte black dial is paired with a two-tone GMT ring, adorned with lume-filled applied indices and baton-style hands. The…