Hi there, I am a newbie here and best wishes to every one! I encountered a vintage West End Sowar Prima watch in the internet but the movement was engraved with the word Favre Leuba. I asked the seller and he/she replied that in the past West End and Favre Leuba used to share the movement, as did Favre Leuba and Zenith. I am skeptical on this but anyway that is not an expensive watch and I think Favre Leuba movement is not bad. Can any one here enlighten me if the explanation from the seller is true or not? Thank you in advance for your help.