Reply to Dave1301:
I just started collecting Gilson Riecke toys. Yesterday I purchased the Cat D-4 with the blade. I also collect the CCM toys. I will looking to add to my Riecke collection.
I met the gentleman many years ago, and at one time I had four of his models, the D4 with blade, a IH TD-9, a New Holland Model 77 hay baler, and a John Deere "G"
I was never able to find one of his Caterpillar D6 tractors
The entry by Ertl with their Precision line of highly detailed models probably did nothing to help either Mr. Riecke, or Mr. Weber market for their sales.