tania30
1 Answer
Daisy!
to lower static coefficient of friction. called jewel bearing.
start in 1704.
In 1902 synthetic jewels were used, usually Sapphire and rubies.
This watch can be rebuilt, any part of it can be repaired. It can last forever, generations.
Watches made before 1902 are highly prized, they contain the real jewel, there is no difference in price of a sapphire or a ruby watch.
| 14 years ago. Rating: 4 | |
Top contributors in Books & Authors category
Unanswered Questions
Sách Giáo Khoa Và Hành Trình Tiếp Cận Tri Thức|Sachgiaokhoa.info
Answers: 0
Views: 1
Rating: 0
36win
Answers: 0
Views: 6
Rating: 0
Đông Á Print
Answers: 0
Views: 11
Rating: 0
thanhdat tech
Answers: 0
Views: 11
Rating: 0
HaHu Việt Nam
Answers: 0
Views: 14
Rating: 0
lucky88app3
Answers: 0
Views: 12
Rating: 0
vipwinfree
Answers: 0
Views: 13
Rating: 0
Máy Chà Sàn Công Nghiệp Cầm Tay Nhà Xưởng Giá Rẻ
> More questions...
Answers: 0
Views: 16
Rating: 0