Most assuredly a proportional font.
NOT. All the typing is Currier mono space.
Nope. The six letter words "pounds" and the "HAWAII" although in different cases and using what would be different width letters in a proportional font, are exactly the same length. They are therefore not in a proportional font, nor is there any sign of any kerning, or any other sign of a proportional font such as tails or arms of letters extending underneath or over other letters, all of which would be found in a proportional, kerned font set.
Are you referring to the form on which the information was entered, or the type style of the entries? The entries look like normal typewriter strokes to me. In particular, look at the weight line, where the lower case "d" in "pounds" appears to have been hit twice.
Looking across the typed lines, there are different degrees of darkness of certain letters, indicating that the typist had more skill with some fingers on the keyboard than others, striking with more force on the "T", "N", "Y" and "7" in particular, which are all convenienlly located under the index fingers.
If the characters do not look like typewriter technology to you, please city specific examples.