Opinion only, but it seems incongruous that such engravings would be permitted to be applied during the period for official wear. This type of embellishment is decorative only. There are no initials, dates, unit designation, etc., as usually seen on presentation and commemorative examples from the period. Additionally, a "plain" blade on such an engraved example is also incongruous. If there were an inscription on the blade or if it were damascus, etc., the fancy engraving would make more sense. I can't imagine such a dagger being allowed to be worn on duty and there is no indication it was made as a "non-duty" memento. Certainly, there are authentic examples that have been mildly customized, but this type of engraving would be, I think, considered to be garish during the period. Also, it would likely have cost far more than the dagger itself. Without some sort of personalization or other special aspect, it makes no sense. The dagger here is highly attractive, but, as the seller more or less states, it should be bought for what it is, whatever that may be.
