The first stage has no Serial # says pat. pend.
none of the outlets are marked for high or low pressure
and the bottom of the first stage is not round as the others I own.
The second stage is serial # 02337
Is this an early model?
Any finfo is appreciated.
Thanks
Scott
![Image](http://s27.postimg.org/xpbz51ywf/001_crop.jpg)
![Image](http://s12.postimg.org/ylvkxm0p5/002_crop.jpg)
![Image](http://s24.postimg.org/3nz0g5j41/003_crop.jpg)
![Image](http://s21.postimg.org/6euur1503/005_crop.jpg)