The jars are nickel plated steel with screw on caps. The caps look to have never been removed, and all 3 jars are full of mercury.Very hard to find high quality precision pendulum with a lot of decorative turning and knurling. There is some oxidation and dirt build up to some surfaces over the years. The arrow Indicating center is bent, seems to be a easy fix, I left that to the new owner, Thanks for looking. All items are available for pick-up in Allen Park, MI 48101. (8 miles south of Detroit, MI). The item "Standard Time Co. Master Clock Seconds Beat Movement 3 Jar Mercury Pendulum" is in sale since Sunday, October 24, 2021. This item is in the category "Collectibles\Decorative Collectibles\Clocks\Replacement Parts & Tools". The seller is "kidstuff4me" and is located in Allen Park, Michigan. 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, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, 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, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Uruguay.