These are 32768Hz/32.768kHz crystal oscillators compatible with various games and devices, notably the Gen 2 Pokémon games; I’ve personally used it to fix the desynchronization of the real time clock in my Pokémon Crystal. 

Specs:

Frequency: 32.768KHz
Frequency Tolerance : ±20ppm
Mounting Type: DIP
Number of Pins: 2
Body Size: 2 x 6mm / 0.08" x 0.24" (D*L)
Lead Diameter: 0.2 / 0.008"
Operating Temperature Range: -20℃~70℃
Material: Quartz