Nice! Sweet rifle!
Sako did ship actions to FN that Browning used (short actions) because Browning only used long actions at the time. This action is a FN action, not made by Sako. Sako never made actions in Belgium, only sent em there.
Don't know if H&R ever used Sako actions, or not. I do know Browning and Ithaca (another sleeper rifle to watch out for)did on their rifles.