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LTD . . Limited. They are not a model they are going to make a hundred thousand of.
BK7 is the type of glass.
The OTA is steel. When you first get it cover up all the openings and spray and polish all the tube with Mr. Sheen. Do it twice (or 3 times) preferably. This will protect the surface for a bit longer especially if you live within 20k of the sea.
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