I very well might be wrong here but memory serves me that the Oumo and FS knots are made in China and its listed on the site the APShaveCo knots are made in Germany so that would negate that they are the same knots....AP Shave Co. G5A is just their name for Oumo G5 and G5C is their name for Frank Shaving G5 (a.k.a. Lather Master).