I have a clutch 25 and a top-handle 25 both for dress-up evenings'.
BB Clutch, I last wore with a black moss (matte) crepe, couture floor-length + (slight puddle-train at back) padded, lurex head piece George Jenson silver/gold and tiger-eye collar necklace, Terry de Havilland silver kid leather /black suede (full-on Swanson does Norma Desmond meets Dietrich does Shanghai Lili). I'd do a clutch with a Le Smoking too.
My BB Top-handle 25 (Arceau) was created for cocktails! Anything LBD, XLBD, pencil-narrow, tulip, mini puff-ball, skater, corset dress, mini or midi slip dress, body-con, princess line, skirt suit. Last time I went to an H (women's) fashion show, every woman looked like she was carrying K25 or B25 in bright colours (although it want in the evening). Last time I wore mine was with a simple Dolce and Gabbana black corset dress, fine-mesh fishnets, scarlet
Gucci Betty heels (T-bar, quite 1950s) large gold/diamond Florentine owl earrings, big 3-colour gold 'firework' ring, HUGE vintage Chanel black leather bow in hair. I think the jacket (corset on the outside leap-lad print inside) was also Dolce & Gabbana, but part of a suit think Elsa Bannister (Rita Hayworth in the
Lady from Shanghai) but without the peroxide hair.