How to tell what frame do I have?

[Sergioal]

Hey everyone this is my first post. I was wondering if anyone knows what frame is this?

 

[golden pinto]

bird engineering ,sears runabout

 

[Sergioal]

bird engineering ,sears runabout

Thanks

 

[markus]

As stated, its a Sears Sold bike, If its 7/8" od tubing it was made by Bird engineering for Sears, If its 1" tubing it was made by Roper Corporation for Sears.........the reinforcement around the headtube points toward it being the later Roper corp made version and not Bird. that transition was happening during 1970

 

[door mat]

it's a sears /Montgomery ward bird. If you need parts or any info on this frame i always see plenty of those at the minibike swap meets.