This is a "medium strength" (red) flipper coil for a Williams/Bally pinball.
There are three coils used as standard, the FL-11630 (this item), the FL-11629 (Blue, the strongest) and FL-11753 (Yellow, weakest).
This coil is comprised of twin windings. A primary 23-600 coil and a secondary 30-2600 coil used for holding the flipper in position. Includes a coil sleeve.
For more information, see our blog post.