If you’re uncomfortable with taking apart the neck, cause the shim stuff Checking if it has a type b4 or a type b5 preamp could indicate it was made after 79 or 80.
Also on the preamp types of capacitors will do it too, if they’re grey or black tower cylinders it’s gonna be an 82,83 or 84 if it’s red and blue blobs it’s gonna be a 79,80,81 or early 82
I found the pics. The second is slightly blurred but you can see clearly some condenser are in different places and of different type. Just for curiosity : Leo preferred blue caps