its a 4 door v8 with a Hydramatic

 

I'll check my '55 Chassis and Body manuals tonight, they may go back to 1949.
The car is a Futuramic Series 98 Deluxe Sedan https://www.classiccardatabase.com/s...49&model=27727
Paint Code 47 was Metal Gray.

Another good read: https://www.hemmings.com/stories/art...y-eight-series

 

This is from the Chassis Manual:

** with rear seat center arm rest

This is from the Body Manual:

So your Trim No 2 is Dark Gray Broadcloth & Light Gray Striped
C in the Body No. is South Gate, CA but confirm that with your VIN.

 

Style 49-3869D = 1949 series 98 Deluxe4 door sedan
Body C 3107 = assembled in South Gate, CA
Trim 2 = Dark gray broadcloth and Light.gray striped cloth interior.
Paint # 47 = Silver Gray (upper and lower)
1949 Oldsmobile (autocolorlibrary.com)