Check the listing for details. 1990s Kobalt Tools Blue Wall Clock TESTED AND WORKING. Color: Blue, Made in China. Listed at 34.99 USD. The 1990s Kobalt Tools Blue Wall Clock is a vintage collectible advertising piece featuring the iconic Kobalt brand. This working clock, made in China, showcases the blue color associated with the company's merchandise. Perfect for collectors of advertising memorabilia or fans of vintage tools, this clock adds a touch of retro style to any space with its 1990s aesthetic and functional design.