Japanese watchmaker Citizen recently unveiled two new Professional Diver’s watches that will arrive next month.

The Promaster Eco-Drive Dive (Ref. BN1024-01Z and BN1024-01E) are equipped with solar-powered Japanese quartz caliber E365 movements.

Crafted in large 46 mm x 16.3 mm stainless steel cases, these diver’s watches resemble a Seiko Tuna without the bulky metal shroud or a mechanical movement.

While they won’t likely satisfy mechanical watch enthusiasts, they offer lower maintenance costs and higher precision than battery-less mechanical dive watches — and at a retail price of $695, are a mere fraction of what a Seiko Tuna costs.

Citizen claims one full solar charge will power the watch for a year.

“This new model is based on the popular BN0156-05E and inherits many of its distinctive design elements including the crown and crown guard at the 4 o’clock position, the shape of the indices and the hour and minute hands, and the silhouette of the rotating bezel. The glossy dial is inspired by the dark hues of the deep sea with its subtle transition into a deeper shade of color toward the 6 o’clock position, producing a simple yet rugged look,” according to Citizen.

Uniquely, the strap is made of BENEBiOLTM*2, a plant-based polyurethane. “Citizen has adopted BENEBiOL for its straps as it is resistant to hydrolysis when exposed to moisture and has a lower impact on the environment.”

With a screw-down crown, sapphire crystal, ridged unidirectional dive bezel, bold easy to read indices and hands, a 300-meter depth rating, a solid screw-in caseback, and even a saturation diver’s helium escape valve — these are made for professional use. Accordingly, in addition to the “DIVER’S” designation on the dial, a diving helmet motif is pressed onto the caseback.

This serious professional diver’s watch represents a good alternative to a mechanical Seiko dive watch, as long as you don’t mind the quartz movement.