"DS" TOC crankset stamp ID ?

[Jesse McCauley]

I believe this crankset is pre 1900 and very well constructed for a one piece.

Does anyone recognize this makers mark stamp? "DS" ?
Many thanks!

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[oddball]

Same as one I have on my TOC Indian,except mine is 26 tooth

 

[oddball]

Here's your sprocket in the 1902 Indian catalog

 

[oddball]

Don't remember DS on my crank, but has same threaded cups and all, yours 22 tooth mine 26.
Cliff