I need your help in identifying this pump... looks like a National A-1 but there are slight differences:

1) There is no sight glass on top of the computer faces.
2) The add glass looks higher than what's shown in Jack's book... on this one, maybe it is only tha angle of the picture.

Anyone can help? They are sure nice pumps!

Thanks
Mike

P1000275 - c.JPG
National A- pump ?


Mike