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Idaho interstate 15 sign.

1961 specification guide sign shield. Manufactured in 1968.

This shield with no state name is Silver Scotchlite on steel and dates to 1968. It uses the 1961 specification for green-sign shields.

Photo by Jake Bear, 10/28/2007.

Idaho interstate 15 sign.

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10798 total shield images in the gallery. Last updated on 10/12/2017.
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