So what did they call this jacket?

[MacLowlife]

Would you want to be dancing with those sporrans? Having said that, they stand like dancers.

[MacMillan of Rathdown]

By and large the gentlemen in the photo seem to be wearing variations (shells and trimmings) of what is referred to (at that time) as a standard doublet.

[OC Richard]

Yes, strange as it seems to us today, Highland dancers used to wear long hair sporrans.

Many top pipers in the 19th century made their living by winning cash prizes at Highland Games, both in piping and Highland dancing.

About the name of that sort of jacket, that's what I'm curious about.

An old Henderson catalogue gives:

274. Doublet and Vest, black, navy, or green vicuna, plated buttons, plain lapels 6.

275. do. but silk lapels 7.

276. Celtic Jacket and Vest, black, navy, or green vicuna, plated buttons 5.50

277. Jacket and Vest, homespun or Harris tweed, leather buttons 5.50

This catalogue was issued by one of the leading pipemakers and Highland Dress suppliers at the very time the jacket in the photo was so popular.
So it stands to reason that that style of jacket is either #274 or #276. But which one? Only two jackets are illustrated, one a Day jacket and the other either a Prince Charlie or a Regulation Doublet (the flaps/tashes aren't visible in the illustration).

[OC Richard]

A full page ad from R.W. Forsyth's Highland Dress catalog from the early 1900's advertising this exact same outfit can be found on page 50 of the book "Scottish Clans and Tartans" by Neil Grant. The caption of the illustration reads "Full Dress" Highland Costume (black cloth, silk velvet, velveteen, or Celtic green doublet and vest)... The doublet itself is worn open and has lapels like and ordinary Regulation doublet or Prince Charlie coatee, rather than the stand-up collar found on the Sherriffmuir or Montrose type doublets. I myself have never seen a name applied to this style of jacket and as far as I know it has always just been referred to as a "Highland Doublet"

I would love to see that Forsyth illustration! "Celtic green doublet and vest"... I wonder if this is the "Celtic" jacket mentioned in the Henderson catalogue...

Note that the jacket I'm talking about does not have lapels like a Regulation doublet or Prince Charlie but rather lapels like an ordinary suit coat from the second half of the 19th century.