Serial number on Rice horse trailer

[Ampera]

Hi, its not maybe the right forum for this topic, but I really need some help to find serial number (vin-number) on my old Rice horse trailer. It should be on the A-frame, but where exactly? How many numbers? Production year is somewhere between 1980-1990...
Please help!

 

[KrujaaLass]

Is there a little plate with numbers anywhere

 

[popsdosh]

Its not unusual for it to be missing. On Rice they tended to be on the front nearside corner of the box or sometimes stamped into the top of the A frame.

 

[dozzie]

My old one was stamped on the A frame at the front. My newer one has a plate also on the A frame.