Hi there,
I don't have the SNDA57 but I do have the green version Ref. SNDA27 which I believe is identical in movement but has a green dial and strap instead of black. I've had mine 7 years and just replaced the battery. It's incredibly accurate and the lume is great as you'd expect from a Seiko. I don't think they're in production anymore but I'm sure you'll be able to find some somewhere online (I've just looked and can find the green version in the UK).
Happy hunting.