Are these lamps OEM?

I have a verly late model D2 (5U17xxx) with an original 24 volt direct start system.  These are photographs of the 24v lamps that were on the tractor when I bought it.  They don't look like the lamps in the parts catalog and I can't find any identifying numbers.  Are these lamps aftermarket lamps or Cat OEM?
 [attachment=62401]Lamp1.jpg[/attachment] [attachment=62402]Lamp2.jpg[/attachment]

Yes Cat! late 50's tractors used those. 5H2067 Head Lamp with 1M5898 sealed bulb.

Thanks Rome; that infomation is helpful because I'm trying to keep the tractor as "period correct" as possible.
Kevin

Your welcome. You can put halogen bulbs in those too for a brighter white light, part # 9W-1281 or ANSI # H4578