US Airmail #C15 Zep - Mint - not so much a hinge mark as a slight disturbance in the gum. Exact stamp imaged.
US Airmail #C15 Zep - Mint - not so much a hinge mark as a slight disturbance in the gum. Exact stamp imaged.
US Airmail #C15 Zep - Mint - not so much a hinge mark as a slight disturbance in the gum. Exact stamp imaged.