Sjors has aposted a new 50Gs feature on the GLX-5500-1 G-Lide. This is a recent G-Shock model that was released earlier this year. It has a modern module with tide graph that's been placed inside the classic 5500 form factor. These are still readily available online for around $90 USD. Take a look and get one now if you like it.

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GLX-5500-1 G-Lide G-Shock