Retro design, cool diver, reliable engine, fair price: all the boxes checked when it comes to the Eska Amphibian 250 . Like many brands that disappeared during the quartz crisis, Eska also has its own revival story with the Amphibian 250 leading that comeback . A version released earlier this year introduced a left-handed configuration with warm brown retro hues. Now, Eska adds a classic blue dial option to the collection with the new Amphibian 250 Blue Dolphin. So far, the range already includes gradient red , smoked green , black, and white dials , but this new version feels more like a proper summer watch while keeping the same robust tool-watch character that made the Amphibian 250 a solid everyday diver.   The Eska Amphibian 250 Blue Dolphin has a brighter, more versatile personality. Its smoked blue dial shifts from a lighter tone in the centre to a darker shade towards the edges.…