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Image Colnect-140-558-International-Prototype-Metre---Krypton-spectral-line.jpg

Colnect-140-558-International-Prototype-Metre---Krypton-spectral-line.jpg
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Type: stamp Issuer: Switzerland Date: 1975 Denom: ?
Visibility: public Image owner: none

postage 2/13/1975 15(c) multi issue=International Meter Convention 100th unwmk perf=11.5

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Source name: Colnect
File URL: http://i.colnect.net/b/140/558/International-Prototype-Metre---Krypton-spectral-line.jpg

Uploaded August 16, 2014, 2:50 pm by Stan Shebs