The Miyota caliber 82S5 is from the 8215/821A family but offers a skeletonized dial design. There is also a gilt version available.
Miyota claims that the caliber 82S5 offers accuracy of -20 ~ +40 seconds per day. This is measured within 10-60 minutes from a full wind via the crown. To fully wind the movement, turn the crown 40 times. The winding direction of the rotor is counterclockwise.
82S5 vs 82S7
The caliber 82S5 has the following layout:
Small seconds at 5:00
Open balance (skeletonized) at 7:00
The caliber 82S7 has the same layout, except it also has a 24 hour (can also be day/night) indicator at 9:00.
Note: There is also a caliber 82S0 variation which is the same as the 82S5 but with central seconds instead of small seconds.
Replacement prices were found online around $59.95.