Miners Dress Hat--What Era?

[RonR]

Here are quite a few shots of a Miners Dress Hat.

Would like to know from what time frame this hat was used.

Profile view:

[RonR]

Left side with the plume:

[RonR]

Left side closer:

[RonR]

Right side:

[RonR]

Front view:

[RonR]

Rear view:

[RonR]

Insignia closer:

[RonR]

Rondel closer:

[RonR]

Top of the hat connections:

[RonR]

Inside view:

[RonR]

Logo closer:

[RonR]

Owner's Initials Closer:

[RonR]

Rear seam closer:

[RonR]

Under band rear seam closer:

[RonR]

Plume closer: