Guess: mounting plate with bubble level for a compass, or perhaps for small portable surveying transit, perhaps an educational model used in the field survey classes CCC held for enrollees?
Neat find, Bruce! Penny Creek?
"of all the paths you take in life, make sure a few of them are dirt" - John Muir
"the wild is not the opposite of cultivated. It is the opposite of the captivated” - Vandana Shiva
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"of all the paths you take in life, make sure a few of them are dirt" - John Muir
"the wild is not the opposite of cultivated. It is the opposite of the captivated” - Vandana Shiva
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