The thin gold line running round these panels looks like the simplest decoration on the almirah. It is the one that would give a workshop away fastest.
The line follows a shaped panel - a curve at the top, straight down the sides, a shaped return at the bottom. What the eye actually judges is not whether the line is beautiful but whether it stays the same distance from the panel edge all the way round. Let that distance vary by a hair through a curve and the line looks like it is drifting, even though nobody could say why.
Marking it out by measurement guarantees the drift, because you can only measure at points and the curve exists between them.
So our master Indian artisans never measure it. The groove for the line is cut with a small scratch tool that has a fence running against the panel edge itself. The tool is drawn round the panel and the fence follows every curve, so the groove is physically incapable of being anything other than parallel to the edge. Whatever the edge does, the line does.
The gold is laid into that groove afterwards. The precision is in the tool, not in the hand - which is exactly where precision belongs.