The watch was housed in an 18K yellow gold case, bracelet and crown, with an octagonal sapphire crystal. This accuracy came at cost with the first 4 Mega model priced at ¥4,500,000. This was a massive step up in accuracy and the watch had a rated accuracy of ☓ seconds per year. This was a significant improvement over the standard ☑5 seconds per month that most quartz movements at the time were rated at.Ĭontinuing to improve upon the accuracy of their watches Citizen developed the calibre 8650A and in 1975 this was launched inside the Crystron 4 Mega (ECQ-W86A). This movement was used in the Citizen EFA (Extra Fine Accuracy). In 1973 they introduced the calibre 8810A that was rated at ±5 seconds per month. Citizen has been developing highly accurate quartz movements since the early 70’s.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |