I have posted this picture before,perhaps some of the newer/younger members have never seen one.It is actually 1/2 of a sign.I took it from the side of a rice mill in Biggs Ca.many years ago,with the permission of the owner.It measures app. 3' by 3".Outstanding color and gloss.When I say rare I have only seen 2 others in my 51 years in Ca. and 30 years driving for Shell.NH3=Anhydrous Ammonia--Shell chemical division,product was used as a fertilizer.

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Frank Jordan