Because even on the moon it's important to get your mail delivered on time :-)
I'm cleaning out the workshop and came across some old model kit boxes I should have thrown out years ago, but couldn't. One was for this MPC Ultravan from 1976.
Years ago I built it into a lunar postal office delivery truck when I was on a fictional - and wild - space vehicles kick. Clearly the moon dust has been hard on the windshield, and I hope those tires are solid and not filled with air!