An engraving depicting the method of signalling using flags using a dot and dash system: AB, BA represents a dot: AC, CA serves as a dash. Dated 19th century

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Details

Creative#:

TOP25302447

Source:

達志影像

Authorization Type:

RM

Release Information:

須由TPG 完整授權

Model Release:

No

Property Release:

No

Right to Privacy:

No

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