Hi Corney,
Haven't had a chance to look at the tractor FEL yet (too busy in the garage with some furniture making!!).
Thanks for asking...I will look at it soon and let you know.
One more piece of information I just found for those interested, my serial number plate also indicate "Z750" which stand for the type of engine and guess what...this engine was also used in the L175 manufactured in the mid 70's.
Thanks for the info guys. It is a start anyway. My research so far indicate a manufacture between 71-75. I also found that the Model L175 is the clone version for the North American market which was also produced in the mid 70's.