C.V Heljestrand MK-series. The crème de la crème of the Swedish straight razors. Most uf us, including myself, thinks of the MK-series as the 30-33 ones. A stiff full hollow, thumbnotch, jimps all around. 4/8-7/8 And then there is the baby brother, the MK 29, a wee 3/8. But the same kind of edge & look. All of the MK#3x looks the same, hones the same & takes an (supreme) edge that is just the same on all models. Here a MK#32: But there is also other models of MK's That doesn't fit in this "Pattern" The MK#6 is probably the one that looks the most as the 3x, but it's steel is different. It has the hardest steel I've ever encountered & it can take an ridiculously sharp but still smooth edge. But you will have to work for it. And it's not just my specimen that's this hard, other members has also sworn that it must have been forged in deep in the fires of Mount Doom... MK#6: Then there is the MK#24, a small wedgy blade. Also very hard, takes an incredible edge. Hard to hone properly, but once done it holds that edge forever.. And there is also the MK#4x, a stainless series, made for the french market. And the MK#13x, probably made rather late in the 50s or 60s. the 134 is a big beast of a blade, the biggest I've seen. Very rare IMO. In this post http://badgerandblade.com/vb/showpost.php?p=3129060&postcount=18 Joe reports of a MK#5, new one for me. So, feel free to post pics & any information you have about the Heljestrand MK-series, maybe it's possible to gather some coherent information from our joined efforts!