Any idea who may have built this 03 custom?

[DANCESWITHEMPTIES]

At one point this rifle was 1903 Springfield built in 1917 (serial no. 690***). It appears to be an early custom model 30-06. But from when & whom are my questions. I've looked at some Griffith & Howe's, Hoffman's & even some Pope's. It doesn't appear to be as elaborate as some of these but it is by no means a local backyard smith who did the work. Can anyone help me I.D. this rifle?

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