This is a rare one from what I've seen I could only find one like it and I believe it had the regulator feature. This one works fine only problem with it is that its missing a piece of wood on the back but does have the original key.
The item "Seth Thomas Antique Regular Wall Clock" is in sale since Thursday, March 28, 2019. This item is in the category "Collectibles\Clocks\Antique (Pre-1930)\Shelf, Mantel". The seller is "mccallistersantiques" and is located in Huntington, West Virginia. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras, Jamaica, Belize, Barbados, Iceland, Sri lanka, Pakistan, Uruguay.