Dating help – Scandinavian Hepplewhite-style chairs

I am trying to narrow down the date of this pair of Scandinavian side chairs and would appreciate input based on construction, materials and style.

The chairs appear to be made of birch with a faux mahogany finish, which was commonly used in Norway where true mahogany was scarce. The design is Hepplewhite-inspired with an open splat back, carved details including rondels, and a shaped top rail. The surface shows pronounced edge wear and developed patina consistent with long-term use. The interior work on the underside and inside rails is rough and uneven, suggesting hand-finishing rather than factory production. The seat has later webbing and upholstery, but the frame appears original. The overall construction is relatively robust, with a fairly heavy underframe and stretcher.

Stylistically the chairs follow the neoclassical tradition, but the proportions and construction feel somewhat heavier and more utilitarian than refined late 18th-century urban work, which may point toward provincial Scandinavian production.

Based on the combination of faux mahogany on birch, hand-finished interiors, developed wear and the relatively solid construction, would you consider these more likely to date from the late 18th century, the early–mid 19th century (c. 1820–1860), or a later historicist reproduction? I would especially appreciate which construction features you would consider most decisive for dating.