aliber 79320 (Portofino Chrono, Fliegerchrono, Aquatimer Chrono) is based on ETA 7750, built by ETA for IWC.
Caliber 8000 developed by IWC using 7750 as base and is built by ETA for IWC
Caliber 98295 "Jones caliber" built by Fleurier for IWC
Caliber 62060 is based on Piaget (Piaget caliber 830P)
Only the caliber 5000 and 89360 are "real" IWC caliber, as they are buillt by IWC in Schaffhausen
Now the discussions revealed that even the so called in-house caliber 8000 and 98295 are not built by IWC in Schaffhausen
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