B Model Mack Frame numbers

[GCR]

Good Morning to all, I appreciate all the great info on this site!  I have a B model Mack that I am looking to sell, but we cannot locate the serial number on the frame, so I can get the title for it.  We have stripped the frame from the center of the axle back to behind the spring hanger and haven't found any stampings.  I have searched all over looking for a pic of the location, but to no avail.  Any help or input is greatly appreciated!  

[BOB DINGSDALE]

behind right front spring hanger. if not there frame may have been changed.

[GCR]

Thank you Bob.  Is it inside the frame, or on the outside? I've stripped it on the outside about 6" past the spring perch, and haven't seen it yet, but as you said, the frame could have been swapped at one point.  

[Maddog13407]

or better yet the early 1953 B models were stamped on the rear of the frame near the roll by the spring hanger so with any modification, it might be non exhistent

[j hancock]

Here is a picture.  Stamped on the outside of the rail.  The hole on the right is where the bulkhead fitting goes for the air line to the front brakes.