I found the outfit on the cover of "The Perfect Gentleman: The Pursuit of Timeless Elegance" by James Sherwood quite interesting. Long story short, I think I would look good in it and am therefore contemplating putting something like it together, but I'm not certain about what level of formality it achieves (i.e., when it would be appropriate to wear). Details of the outfit that I can identify: Shirt: winchester shirt (white collar), with alternating blue and grey vertical stripes and white shadow stripes, medium-spread turndown collar Waistcoat: Light blue, double-breasted with peak self-faced lapels (technically could be notched, but I severely doubt it) Tie: Dark gray 4-in-hand with white pin dot pattern in what appears to me to be a half-windsor knot Coat: Single-breasted notch lapel with black and white houndstooth pattern; single-welt breast pocket; number of buttons isn't discernable, though there is significant roll of the lapels towards the button which makes me suspect a link front. Accessories: boutonnière, white silk handkerchief, and pearl tie pin. Unknown details: Coat: number of buttons, style of side pockets, number of vents, cuffs Shirt: style of cuffs Trousers: everything Shoes: everything But for the coat, everything else about the ensemble leads me to think formal or semi-formal morning wear (either morning dress or stresemann / stroller). Though a houndstooth patterned morning suit is certainly possible to create, I can't imagine it looking good, so in my estimation it's a lounge coat, but I was under the impression that for semi-formal morning dress, the lounge coat should be charcoal grey or black and should have peaked lapels. With its houndstooth pattern and notched lapels, I would assume it isn't acceptable for either, in which case, though it borrows heavily from more formal morning dress, this outfit would likely be relegated to the "lounge suit" dress code. In my imagination, the missing details are: Coat: besom pockets and is either unvented or has double vents Shirt: white double cuffs Trousers: dark grey sharkskin or flannel without turn-ups. Shoes: black calfskin cap-toe oxfords Given these imagined details, I seek the advice of the more informed: to which dress code could such an outfit be worn?