Would someone advise me what would be the correct part number for a Waltham model 1899 hunter case Riverside, serial #12047261? The E.J.Swigart book lists 6 different 4th wheel part numbers for this model. WHICH would be the CORRECT one for the model I have? Thanks.

If you are looking for a wheel and pinion there are only 3 listed...4823, 4924, 4825..The other three are for the gear only...I looked at a 19 jewel Riverside I have and it has a gold center wheel and the rest of the train wheels are gilt...If that is your case the 4823 should be the one you need...The other wheels listed are gold gears...Gary

Thanks for the information Gary.

UPDATE 7:37 PM 4/30: Gary is right. #4823 is the CORRECT one.