The postcard above shows a soldier in Full Dress, which was withdrawn in 1914.
Here's what the KOSB looked like in the 1914-1918 period:

Yes as a Lowland regiment their Full Dress uniform (withdrawn in 1914) was scarlet doublet and tartan trews. Their Service Dress, worn from 1914, was as above, though some photos show the Scottish-cut tunics.
Here's the 4th battalion in 1914

Pipes & Drums of the 8th battalion, showing kilted pipers, drummers in ordinary trousers as per the remainder of the soldiers of the battalion

Thing is, the KOSB had numerous battalions in WWI including Territorial battalions, which sometimes had uniforms quite different from the 1st battalion. It's not inconceivable that the KOSB had a kilted Territorial battalion, it could be looked up.
Here's a list of the KOSB battalions in WWI, showing fourteen:
http://www.1914-1918.net/kosb.htm
Yes the pipers would be kilted of course, in all battalions.
Last edited by OC Richard; 8th September 17 at 03:57 AM.
Proud Mountaineer from the Highlands of West Virginia; son of the Revolution and Civil War; first Europeans on the Guyandotte
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