Here's a real 'blast from the past':
"He (Jehovah) says the requirements for special pioneers shall be 175 hours and 50 back calls per month, which should develop into a reasonable number of studies; and for regular pioneers 150 hours and as many back calls and studies as can be properly developed during that time. And for company publishers he says, 'Let us make a quota of 60 hours and 12 back calls and at least one study a week for each publisher.' These directions come to us from the Lord through his established agency directing what is required of us; and, for those who really love the Lord and are guided by his counsel, that is a reasonable service requirement. This expression of the Lord's will should be the end of all controversy. It is for your good that these requirements are made..." -The WATCHTOWER July 1, 1943 pg 205 (Italics mine)