These were originally from Panther Cycles (Germany), who made e-bikes and various other bikes, shells made in China, but we have limited information

• Cnc machined Alloy eccentric bottom bracket shell
• 68mm shell length with BSA standard English thread, 1.37 x 24 tpi
• 54mm diameter
• Alloy shoulders 61mm outer width, 12.5mm thickness, 35.5mm apart
• 1 fixing hole 5mm diameter
• Weight 110grams (approx)