The USQ1102 is used on several pool pumps. The shaft seal will depend on the pump. Send us a couple pictures of the complete pump so that we can identify the model. At that point, we can recommend the shaft seal.
Great pictures! It looks like you have the Sta-Rite Dura-Glas II. That pump has used two different shaft seals. Until October of 1997, part number 5250-102 was used. If there is a copper cone in your seal plate, you’ll need the pre-October 1997 seal.
Since October of 1997, part number 5057-07 has been used. You would use this seal if there is no copper cone in the seal plate.