White tops are newer than blue tops, change was made about early 70s. Mine are white, put up in "76 and "77. Weight depends on height, since upper panels are thinner. I had my 70 footer increased to 90 feet, so builder had to take it down to 50, then add correct thickness panels, and put the bottom back on. Glass is fused to steel, so weight of a panel is not the same as a steel sheet. Farm Show magazine had the story about the silo mover that moved them intact, laid down.
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Today's Featured Article - Tractor Profile: Allis-Chalmers Model G - by Staff. The first Allis-Chalmers Model G was produced in 1948 in Gasden, Alabama, and was designed for vegetable gardeners, small farms and landscape businesses. It is a small compact tractor that came with a complete line of implements especially tailored for its unique design. It featured a rear-mounted Continental N62 four-cylinder engine with a 2-3/8 x 3-1/2 inch bore and stroke. The rear-mounted engine provided traction for the rear wheels while at the same time gave the tractor operator a gre
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