File:FMIB 44936 Endless Diamond Chain Exhaust Box (Patented Sept 15, 1914) (Burpee & Letson, Ltd, South Bellingham, Wash).jpeg
![File:FMIB 44936 Endless Diamond Chain Exhaust Box (Patented Sept 15, 1914) (Burpee & Letson, Ltd, South Bellingham, Wash).jpeg](https://upload.wikimedia.org/wikipedia/commons/thumb/b/b4/FMIB_44936_Endless_Diamond_Chain_Exhaust_Box_%28Patented_Sept_15%2C_1914%29_%28Burpee_%26_Letson%2C_Ltd%2C_South_Bellingham%2C_Wash%29.jpeg/800px-FMIB_44936_Endless_Diamond_Chain_Exhaust_Box_%28Patented_Sept_15%2C_1914%29_%28Burpee_%26_Letson%2C_Ltd%2C_South_Bellingham%2C_Wash%29.jpeg?20150823032517)
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