At least with my regular 404, I could only get a seal with my glasses off. The thinner Lambda pads allow less room for compression/sealing to occur (even though my frames are on the thin side).
Just my 2c I wouldn't use the wood box as any gauge to the age or the driver version. I've owned two K1000 with natural wood box that were different inside (top lid), but they were both in the same serial number range. Using the box to determine the sound of the headphones is like using an LP jacket to determine which pressing it is (ie record companies some times just put the record in whatever jacket they had on hand at the time).