Nice Murray find, I see Murray's from the 90's but usually not around those years but it would be nice to find one of the tan Monterey's from then.
I know on some years the stem might have the last two numbers for the year, on my 86 it is on the head badge sticker and the numbers on the sticker above the bottom bracket like on my Monterey Christine bike the last two are 94 for 1994 same as the stem.