Anything that is too accurate will totally queer the market as far as collecting goes.
Those of us who have been collecting for a while should be able to spot a fake quite easily, but new collectors could quite easily be fooled. The 'Repro' Webley boxes currently on offer are a prime example, as no attempt has been made to distinguish them from the original, and I've been told of one long time collector who was actually taken in by one, so what chance does the less experienced collector have.
When I was making and selling 'repro' Webley pistol boxes and selling them for the same price as those currently on offer at a well known south coast store, I made sure they were easily distinguishable from the real thing, whilst still making the labelling as realistic as possible, but they could not be mistaken for an original by anyone apart from possibly a novice collector, but any collector should study his collecting interests before plunging into the market.
I have only replicated one cardboard Webley pellet box, the .25, and externally it is as near to the original as it was possible to get, but internally, anyone opening the box would see it is made from a Kellogs serial box, and there aren't many of them in existence at present.
I did replicate another box from another maker for a friend as an experiment, using old advertising drawings, colouring guess work and measurements from other similar period boxes, but as no one that we know of has ever seen an original, it's going to be difficult to compare, and as he has the only ones apart from myself, it's not likely to get onto the market. As he said to me, it looks to new to be mistaken as having been made in the relevant period, and of course they didn't have laser or inkjet printers.