bbforks,
I used to work for Komatsu up to 2001 (not in service area) and after Komatsu I was involved in selling used lift trucks - wholesale & retail - that were in defunct dealers inventory. The Komatsu model look correct and seems to verify that it is a pneumatic tire lift vs a cushion (press-on solid), what is puzzling me is the serial number typically the letter A is all that is at the end of the s/n - this indicates the unit was built in the United States or America. The Z is a new thing for me not certain what that means but you need to verify if taht is legit. Secondly, not being to locate a stamped in s/n raises a bit of a flag - more that once a dealer has been know to grind it off & install a different data plate to fool finance company auditors. You should be able to get an engine model number & serial number off the engine name plate & there maybe be one on the transmission. With all that information contact a Komatus dealer in your area & they should be able to verify model, serial number of truck & mast model, s/n. In your neck of the woods I would recommend you contact C & C Lift Trucks (a Komatsu dealer in New Jersey/New York area) and ask for a "old" but younger than me friend of mine Ron Fuchs (he is in sales but is very knowledgeable on the technical side too, is a Marine & German we worked together at one point in time). He will point you in the right direction. Use my name John Johnson.