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Post an interesting snapshot of what you are working on. Wether you are a pro photographer, or taking snaps on your phone, it does not matter - we love watch movements and we want to see them and talk about them.
Two things to bear in mind here are that you have to be careful that you don't short the battery to/through itself, and don't slip off the battery clamp screws and hit the coil windings. It doesn't take a lot to break those wires. If the watch was running just before changing the battery, and you haven't shorted the battery or somehow broken a coil wire, it's anyone's guess. I don't recognize the movement, but I haven't been messing with quartz watches very long. Good luck.
I'm glad to know that it's not just me. I've been going nuts trying to find a crystal to fit what looks to be a ladies Sea-Hawk, possibly aka, "Mermaid", for this type case. What makes it difficult for me is that the, at least arguably, most important dimension is the ID of the crystal, not the OD, as is the usual case. I've tried a couple of different sizes, without the step, and I'm getting close, but still don't have the dial covered yet. :-( I don't remember it being as difficult with my men's Sea Hawk. But this ladies version is a tough one.
As far as the OP's watch, I don't know if it does need the Benrus press, but the company did make a special tool for their waterproof cases. And yes, the watch back does say to use a "watch blade", so I have my doubts, as the Benrus tool is a screw-fed press, i.e. very un-blade-like. I have the tool, but still no crystal. Good luck.