Hi Mike,
No, a' 24 Bern wood mag bottom was held by one retainer pin only...unless it needed some help/repair and a second one was added.
If you compare the shape of the rim of the wood finger knobs on the first eBay offering with the shape of the wood on this 2nd. "revshop" offering, you will see the difference in the shape of the knobs on an early DWM vs. a Bern magazine as well.
The Swiss did double-pin their M1929 Swiss Luger magazine...but the placement of the two holes/pins is in more or a symmetric pattern.
BTW...seeing '24 Bern magazines at guns shows is an interesting surprise...sellers usually assume they are repro's and most of the time price them as such...I have found several cheap...