Image Colnect-3451-524-Telescopes-of-Galileo-Newton-Cassegrain-and-Ritchey.jpg

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Type: stamp Issuer: Nicaragua Date: 1985 Denom: ? Visibility: public Image owner: none postage 11/26/1985 21.00cord multi issue=Halley's Comet d=Airmail unwmk perf=12.75 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/b/3451/524/Telescopes-of-Galileo-Newton-Cassegrain-and-Ritchey.jpg Uploaded May 24, 2017, 8:20 pm by Stan Shebs