Stamp: Allegorical subjects (Type Blanc type II)) (France 1929)
Allegorical subjects (Type Blanc type II)) (France 1929)
01 June (France ) within release Definitive Issue goes into circulation Stamp Allegorical subjects (Type Blanc type II)) face value 10 French centime
| Stamp Allegorical subjects (Type Blanc type II)) in catalogues | |
|---|---|
| Yvert et Tellier: | Yt:FR 233 |
| Michel: | Mi:FR 238 |
Stamp is vertical format.
Stamp Allegorical subjects (Type Blanc type II)) it reflects the thematic directions:
Elements of industrial instrumentation have long histories. Scales for comparing weights and simple pointers to indicate position are ancient technologies. Some of the earliest measurements were of time. One of the oldest water clocks was found in the tomb of the ancient Egyptian pharaoh Amenhotep I, buried around 1500 BCE. Improvements were incorporated in the clocks. By 270 BCE they had the rudiments of an automatic control system device.
