I think that with a taller saddle, this seatpost would be just long enough!

It's often the case that us long-legged types struggle to find the perfect stack and reach in a vintage racing frame.

At least with this bike I don't see this rider running the saddle back on the rails, so the post's durability won't likely be tested as when a saddle gets slid rearward.

My Gitane TDF reminds me of how I struggled to find the needed height, it's still my smallest bike so still looking for a new home.
The saddle is slid back because the seattube angle on this small frame is quite steep, though the reach is still short for me.