Finally after a long journey, I find few pcs of DPDT switch with center off. You might be asking why we should have a center off switch? Probably not everyone needs this kind of switch. One application crosses my mind is to measure stereo channel bias with single bias meter only. Probably due to safety and durability issue, you will not measure your bias all the time you use your system. So with this switch, you can always switch left or right to measure respective channel and put back to the center to turn the measurement off.
And this Nittei Musen brand has been in this industry more than half century ago… Welcome to the 21st century!