I didn't have any luck with the numbers you provided, but below is a link to the Sylvania website that lists the different sealed beams by size and the numbers with in the chart.
This might help you identify what you have. There is also a product identifier section that gives pictures of the sealed beams that I would think should help you identify your lamps and be able to determine what the correct lamp replacement number would be.
http://www.sylvania.com/ConsumerProd...ting/ECatalog/