Geographical measurement (1672), Earth fold and Brownian mot (Czechoslovakia 1987)

06 July (Czechoslovakia ) within release Anniversary goes into circulation Stamp Geographical measurement (1672), Earth fold and Brownian mot face value 50 Czechoslovak haléř

Stamp Geographical measurement (1672), Earth fold and Brownian mot in catalogues
Michel:	Mi:CS 2919
Yvert et Tellier:	Yt:CS 2730
POFIS:	POF:CS 2802

Stamp is square format.

Also in the issue Anniversary:

• Stamp - Prague Town Hall mathematical clock, Theory of Functions dia face value 50;
• Stamp - Geographical measurement (1672), Earth fold and Brownian mot face value 50;
• Stamp - J. M. Petzval (1807-1891), J. Strouhal (1850-1922) and V. Ja face value 50;