When I put my initials on the inside liner of a knife, I include the year the work was done.
This years it looks like this:
DRV '12
The fact that the initials are on the inside of the knife shows that this was more than just the owner’s initials.
The average knife owner won't be able to get a knife apart and back together, so the location of the initials shows that it was the person who worked on the knife. The addition of the year would in the minds of most people indicate an event, such as the rebuild or customizing.
If the initials are put on with an engraver and done freehand (the method I use) they are much less likely to be mistaken for factory markings. Stamped letters however, might be mistaken for factory markings. I am sure most of us who have take knives apart have encountered stamped letters and even words inside of knives on liners, and springs. Etched marks inside a factory knife, while not unknown, are less common.
The electro chemical etch on the blade (of my name or logo) is nice for knives that I do not have to take apart. I can still mark them as customized without dissembling the knife, though usually I use both markings on a knife if I have taken it apart, (depending on blade size, owner requests, etc). The visible etch on the blade is nice for the owner who wants to advertise the fact that this knife is customized and it helps people recognize my work.
IMO, I don’t thinks it makes a lot of difference how anyone marks the repaired or customized knives just as long as they
DO mark them somehow to indicate that they are not as they left factory.
As far as repairs only go- if the person is using the same part from another knife with the same brand & model number, I don’t care if they do mark it or not, (if they do a reasonably good job of the repair).
In other words if they are changing nothing about the knife except to repair it with the same type part with the same markings, then I don’t think it is an ethical violation to leave the knife unmarked.
That is my 2 cents.
