Should be able to pull it out and rotate the little metal tabs between each digit to advance them (without spinning the whole thing for miles and miles and miles)

It's been a while sense I plaid with mine, but I had no problems presetting it before installing the actual odometer number/counter assembly.

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-