Bianchi holster applications

[MCM]

I am a lefty so I have no personal use for this holster,but it was nearly FREE!
I did a little research,& could not find any info.If anyone can provide any insight as to the age(it appears to be unused), & the Revolver(s) it suits I would certainly appreciate it. Thanks.

 

[CBH]

It appears to me to be some sort of duty holster, can't verify it's age but I would bet it fits a S&W K frame with a 4" barrel; like a model 15/19/67/66 or the fixed sight comparables of those models, 10/12/13/64/65.