On the topic of decoration on jackets, you might have noted that the mid and late 19th century photos I posted of men in "day dress" show jackets which are absolutely plain, without gauntlet cuffs or epaulettes. The same is seen repeatedly in The Highlanders of Scotland, "day" jackets which are plain ordinary jackets.

Both in old photos and in The Highlanders of Scotland, there are sometimes seen men in full Evening Dress finery but wearing jackets which are absolutely plain, black with matching black buttons.

But in the 1930 catalogue gauntlet cuffs and epaulettes do appear on both the Evening and Day jackets.