Enigma on Wheels

This black and white photograph features a weathered Land Rover trailer with a cryptic handwritten message displayed on a sign. The faded text includes "RAF MP84,33 0.326.720" along with an expiration date of "3 DEC: 1935."  A name, "B. Laske" and another set of numbers and a date, "14393533 31st DEC 1935" are also visible.