Morning everyone. My loving wife has been shown a Singer 15NL Sphinx with hand crank set-up. It is absolutely beautiful to me, and I've wanted a hand crank model for some time. I've looked around some, and have learned there are reproductions of this machine out there. How do I identify a reproduction example? What would be the fair price on an original in fair condition? DW is encouraging me to try to buy it, but I'm hesitant without more information. Please offer me guidance. Thanks, Don.