zenith 1 identifaction help

[sphooch]

I've decided to take apart my extra carb. and in doing so found these markings on it I hope some of you guys can explain. the lower half stamped zenith 1 .....the letter E in raised form is in the center on the opposite side of the secondary well position and stamped in about 1-1/4 in. inboard past the choke hole is the # 59 ..on the upper half at the throttle hole raised is the #B50 then inside the carb on the float bowel section is the raised letter H and raised # 29 ...Holly?? I'd appreciate any help in this thanks THE HOOCH