Cradle for charging Withings (Nokia) HR Steel (40mm). Keeps the flimsy charging button and the watch neatly together during the charging. Designed to have 50x50x3mm square steel washer attached to the base for extra weight and stability.
Use the pilot holes to align the cradle and the base for gluing. Glue the steel washer (or something other thin and heavy) under the base and add some foam pads.
I used ABS and did acetone wapour smoothing after gluing the printed parts together.