Guest Posted September 25, 2018 Share Posted September 25, 2018 I have three lenses that I bought on ebay over a decade ago. I only opened the package to check for breakage. Even though the package has an Ottawa P248 number and the label says 29/30 - Pontiac, Marquette and Peerless that is not what these are. On the rim of the glass it says 9/16 x 8 31/32. I would appreciate a positive id. As soon as I know what they fit they will be for sale to a good home. Link to comment Share on other sites More sharing options...
Tom Burtch Posted September 26, 2018 Share Posted September 26, 2018 These look like replacement lenses (no script) and Ottawa was one of the aftermarket lens manufacturers. The original lenses for 1929-30 Pontiac and Marquette were Tiltray number 912185. These lenses have flat faces and locating nubs on the bottom as shown in your photo. The size listed for the Tiltray lens is 9 7/16 OD x 8 31/32 prism, but I have also seen 8 15/16 marked in the glass rim as the prism diameter. Aftermarket replacement lenses generally have very little market value. I have good used Tiltray lenses for sale if you need them. Tom Link to comment Share on other sites More sharing options...
Guest Posted September 26, 2018 Share Posted September 26, 2018 Thank you Tom. I have six proper lenses for my car. I was hoping to identify these three so maybe someone that needed a lens could have them. I have no idea what they really fit. Link to comment Share on other sites More sharing options...
mribbich@wi.rr.com Posted September 27, 2018 Share Posted September 27, 2018 You need to measure the inside and out side diameter of the lens. Marv. Link to comment Share on other sites More sharing options...
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