It's a long shot but I need a PN # 43 (Demand Valve) for the JM Cousteau Royal second stage. I haven't pulled the valve out of the box bottom yet so I don't know if the (Teflon/rubber piece) can be flipped over but just looking at the cut sheet from the manuals section, I suspect not - could be wrong though.
Thanks.
![Image](http://i6.photobucket.com/albums/y245/trepanned23/JM_zpsmiipz3eq.jpg)