'This one doesn't look much like an American dulcimer, although it's clearly a member of the same family, which includes the epinette de vosges from France, the Hungarian citera and the Swedish Hummel. This seems to most closely resemble a hummel, but I'm no expert.'

The instrument on sale looks very similar to some types Flemish 'hommels' described in Hubert Boone's 1970s study 'De Hommel in de Lage Landen'/'The Hommel in the Low Countries' and it seems to make sense to identify it as a European dulcimer/epinette/hommel; type instrument.