Flight Trial Stamp (1 sen 5 rin / 3 sen) *Authenticity not determined

Product Description:
Thank you for looking.
This item is being sold as part of a collection clear-out.
It was collected by my grandfather, who was a stamp dealer.
Overprinted designs of airmail stamps issued during the Taisho era.
• 1 sen 5 rin (blue)
• 3 sen (red)

[Product Condition]
• The original gum (adhesive) remains on the back.
• Slight hinge marks are visible. Please check the back images for details.
• Please judge the condition of the front and back (stains, perforation condition, etc.) from the high-resolution images.
• As this is a very old paper product, please understand that there may be natural aging and deterioration.

[Important Notes]
• This item has not been authenticated by a professional organization. Please examine the images carefully and purchase only if you are satisfied.
• Due to the rarity of this item, returns and cancellations will not be accepted after shipping to prevent fraudulent exchanges.

[Shipping Information]
As this is a valuable item, it will be carefully packaged to prevent bending and moisture damage, and will be shipped via Mercari便 (Mercari delivery service) with tracking and insurance.