Seagull 21 Jewels ST16 ST1612 TY2806 Day-Date Automatic Movement, GlossyPolished Parts With Column Wheel & Day-Date Calendar.

The TY2806 automatic movement has a similar train layout to the Japanese Miyota 8215 day-date movement, and the winding mechanism has a Seiko-style auto-winding ‘Magic Lever’ system inspired by Seiko. This provided Sea-Gull with a modern, simple and efficient full-sized wristwatch calibre that served as the basis of a myriad of complicated variants. The TY2806 movement is produced by Tijin Seagull in China. It is a cost-effective high quality design that is used by a lot of watch brands such as Android, Rotary, Ingersoll, Fossil, and Zodiac watches etc...

BPH- Beats per hour
The TY2806 day-date escapement beats at 21600bph or 6 beats per second between each marker. Most mechanical movements rin at 18000 BPH or 5 beats per second. Higher end movements have higher beats per seconds. The second hands on these movements tend to display a smoother running second hand.

21,600 beats………..1 hr………..1 min
————-..X…———..X..———..=..6 beats per second
…..1 hr……………..60 min………60 sec

JEWELS
The TY2806 has 21 jewels. No they aren’t real as I’ve often heard people say 🙂 Jewels are synthetic rubies that are used to reduce friction and wear on moving parts. They don’t add any real value. Lower end movements have 7 to 15 jewels while the standard for most quality watches is 17 or more.

POWER RESERVE
The Power reserve on the TY2806 is 36 hours when the mainspring is fully wound. Most watches have a power reserve of 30 hours or more

Condition: Overall in brand new condition and movement keeping excellent time.