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+ Barograph Accuracy Evaluation - January 2017
- Mercury Barometer Accuracy Evaluation
- Digital Barometer Accuracy Evaluation

Observator

Observator was founded in Rotterdam in 1924 as a manufacturer of nautical equipment.  They began making dial thermometers in the 1930s.  They founded a meteorological division in the 1980s.  If anyone has vintage catalogs of Observator meteorological instruments, please email PDFs to me and I will post them on the website.

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