Comoy’s With Five Digits

[DotAndBang’sPipes]

I’ve noticed a few Comoy’s with five digits instead of 2, 3, or 4. I’ve googled and googled and searched this and other forums but can’t seem to find any info on them. Does anyone have an idea about these?

 

[simong]

Modern production (Cadogan).

 

[DotAndBang’sPipes]

Ah thanks!