File:Maksutov-Cassegrain-Telescope.svg - Wikimedia Commons
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Bill Keel's Telescope Life List - Bolshoi Teleskop Azimultanyi
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UDSSR Teleskop Fernrohr 20x50 Monokular T33 - Catawiki
RARE SOVIET USSR MONOCULAR TELESCOPE TOURIST-4 10x30 | eBay
Vintage USSR Russian Monocular Telescope ZZT 10X30 mint in Case | eBay
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Spektr-R - Wikipedia
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BTA-6 - Wikipedia
Small School refractor USSR. The path of "perfection"
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