Speed Limit 14.5 MPH
14½ MPH speed limit sign, Lockhart Gulch Road in Scotts Valley, CA. Lockhart Guilch is a public road where this sign is posted.
I've seen oddball speed limit signs on private property (parking lots and mobile home parks and the like) but I think this is the first time seeing something like this on a public road. This road is maintained by Santa Cruz County.
Local authorities are limited by California statute (CVC 22358.3) from using strange speed limits like this. Any speed limit other than the state prima facie limit of 25 mph must be posted, so the police probably can't ticket you on this road.