Shimano sealed bottom bracket BB-UN52 68mm BC 1.37 x 24 vintage road biking | eBay
I have an old Giant road bike with SORA components and the bottom bracket says BC 1.37x47 Road LK on the non-drive side and BC 1.37x24 Road LK on the drive side.
Bc 1.37 X 24 United Kingdom, SAVE 34% - online-pmo.com
Shimano Bottom Bracket Parts BB-UN55 BC 1.37 x 24 | eBay
Shimano BB-UN52 Cartridge Bottom Bracket 68mm Shell English Threaded bc 1.37x24 | eBay
Shimano Bottom Bracket BB-RS500 English Threaded 68 mm BC 1.37x24 Road A20 | eBay
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Shimano BB-RS500 Hollowtech II English Bottom Bracket - World Class Bikes
1.37 X 24 Bottom Bracket Netherlands, SAVE 58% - cambridgechoral.com