Lonnie,

Why would a 12v non-halogen bulb be more/less old school than a 12v halogen bulb? They are both sealed-beam like the 6v original (but neither are 6v original school).

Unless you are comparing to the high output halogen two-piece bulb/housing (non-sealed-beam but much brighter - available in 6v or 12v).

some sources of 12v non-halogen (maybe?) bulbs:
http://www.bughaus.com/karmann_ghia_light_bulbs.htm
http://www.taillightking.com/Headlight_bulbs.htm
http://glenssurplus.com/proddetail.php?prod=GE-6014
http://www.eisparts.com/6014/Headlight,Sealed+Beam,7%22,+12V.html