Sentence:  Another shipmate remembered the watch clock on the strap we had to carry to <WSD>punching</WSD> stations. He was assigned to a guard shack. He had rounds to the Officer's Club and sleeping quarters where he'd have to <WSD>punch</WSD> the clock at different stations. 
Meaning of the word marked with <WSD> tags:  To operate (a device or system) by depressing a button, key, bar, or pedal, or by similar means.