Seiko’s Time Sonar was an unusual watch when it debuted in 1976, featuring a transparent dial and sonar-inspired aesthetic. It combined a transparent dial, one of the world’s earliest display casebacks and a futuristic design. Casio’s latest MTP-E740 is its own interpretation on the transparent dial style, albeit with a few differences from the Time Sonar. CasioI’m looking through youAdmittedly, the new MTP-E740 isn’t a faithful dupe of the Time Sonar. For the task, Casio goes with a transparent dial just like Seiko’s, and in five colorways: black, orange, blue, navy blue and teal.