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Incorrect - no typo - in fact when I looked up case 1650010 and brought up the BOM on the Omega Extranet, I checked the photo of the case back they have there, and looked at the stamp on the inside of the case back - was stamped 165.010 - 62, so I had already double checked it's the right information before posting it.
The information I've presented is correct per the Omega Extranet. Is it possible that the Extranet is wrong? Sure, but after ordering thousands and thousands of parts for hundreds of different Omega models, I can't recall an instance where I have the wrong case parts come in.
But you asked about 2 different cases...if you were assuming the 1660024 = 1660324, then that's a false assumption. I think this is why people get confused, as they assume different case numbers are actually the same case, when they are not. Omega doesn't change case numbers without there being some physical difference between the cases (adding in the extra 0 notwithstanding).
The 1660324 is 063PZ5152, as is the 1660024 SP.
The 1660024 without the SP is 063PZ5076.