Well, I can't say I've seen one of these before -- here's the key to my Negus Chronometer -- it looks as if it had a ratchet or pawl inside the lid, now, something's missing and they glued the whole thing together so there was no more ratchet action. I'm hoping somebody has an image of what the click looked like in this thing -- and I'm not even sure that the long flat clickspring was right. Any images would be of great help. The original cap to this has a pair of dolphins that are gilded -- quite lovely. If I can make a pawl, and locate two screws that are long missing, I can put the whole thing back together. Wish me luck. This is a new land to me --- hope everyone is staying safe and healthy.