rear side marker bulb type for '70 Suburban

[PM27G0D]

Checking all the bulbs everywhere and noticed the rear side marker bulb contained in the left tailight housing is burned out. The small bulb is so oxidized that I can't read the bulb type and it may not even have been the correct one.
Anyone know the correct type?

 

[PM27G0D]

Checking all the bulbs everywhere and noticed the rear side marker bulb contained in the left tailight housing is burned out. The small bulb is so oxidized that I can't read the bulb type and it may not even have been the correct one.
Anyone know the correct type?

Well, kudos to the fsm yet again....1893 is the magic number....rear side markers....wagons only.