Police Baton, Nightstick, Club

Picked this up at a yard sale for $3.00 today which I thought was a good deal. Not military, has no markings at all but is police issue. Sold to me by the son of the policeman. I don't understand why he wanted to part with something so interesting of his father's but my gain.

https://www.milsurps.com/images/impo.../LRmptH0-1.jpg

https://www.milsurps.com/images/impo.../pskv4t0-1.jpg

Surprisingly little information I can find about these on the net. I've been keeping my eyes out for a US marked example but haven't seen one in quite a while.