Sleeve-type incoming wire insulator ☆ Set of 3 colors: brown, white, and blue

Thank you for looking.
This is a very old insulator.
The exact manufacturing date is unknown, but it may have been produced around the pre-war to post-war period.
Insulators of this type are rarely used today. They were once attached to wooden buildings and used to insulate the service drop wires that brought electricity from utility poles.
There is a lot of minor dirt.
Also, the screw fitting on the white insulator is deformed.
The ceramic insulator itself has no cracks or chips.
(The crack-like marks on the blue insulator appear to be from the manufacturing process, as they are within the blue glaze.)
I believe the condition is good for its age.
It is quite rare nowadays.
Although the insulator has a deformed fitting and a lot of dirt, please understand that it is sold no claims, no returns.
We look forward to purchases from those who understand this.
Due to size constraints, shipping will be via Japan Post's Yu-Packet Plus, which can accommodate items up to approximately 7cm in thickness.
If you complete the purchase procedure, you can also choose to pick up your item at a nearby Lawson by specifying a pickup location.
(Please be sure to specify the pickup location before completing the purchase procedure.)
We also recommend this as an item to create a retro atmosphere.
Please consider it.