Celtic white bronze Colonial shoe buckle is an interwoven design. The Celtic goes well with the Connie,or the Debbie for a Scottish impression. Buckles are sold separately but no added charge for postage when you buy them with your shoes. Price for a pair of buckles $35.20
For the Ladies, it is much the same. Plain for workers Brass seems more used but there still were Silver metals that were available. Ladies Plain buckle, Vine and Leaf for shoes like the Barbara, Connie would be appropriate. There might be a small difference for the Debbie and Martha, the Ribbon or Celtic would be as at home here as the Plain, or Vine & Leaf. It would not be incorrect to use one of the larger buckles if the shoe would carry it.
Of course to add elegance gem added to the buckle or even using the Pierced buckle with colored stones to match her gown would also make a statement of place in society.
Although our tension buckle may not be of the period, it does look very well with the Martha and so easy to use.