Yours is super nice. In the same class as a custom model 70 but would have cost more. The model designations were all over the place depending on the market it was made for. The one's in classic American cartridges, and with white line spacers on the pistol cap, were made for US market for sure. In any rifle guy's top three list for smoothest action ever in a factory bolt action rifle. I have had two and both had date of manufacture on left side. The one I have presently is a 7x57 in model HK made in 1962 in a fullstock. Nice gun but not done up like yours at all in terms of engraving or stock carvings.