Gruen Precision 17 Jewels, N510CA, ‚Day-Night‘

Beschriftung Zifferblatt / Marking Dial	Gruen Precision 17 Jewels
Uhrwerk / Caliber	N510CA
Modellname / Model Name	Day-Night
Baujahr / Year	1960s
Anmerkungen / Remarks	changes colors every 12 hours
Copyrights Photos	photgraphs by courtesy of pack43, http://www.ebay.com/sch/pack43/m.html?