I have one OS puck that I use that's gotta be at least 40 years old and it has a bit of soapy spicey smell (lathers and works great)
I have had two unused OS pucks, one boxed for refill, one boxed inside its mug under the thin plastic 'seal'.
What has worked best for delivering the scent for me: grating up enough of the pucks to pack a twist-up shave stick full. The cap seems to hold the scent, where as it seems to dissipate to almost nothing sitting in the mug even under a wooden cover. This is true for other soaps as well, mug versus covered twist-up stick format.