I have for sale original sales brochures and original proposals for sale from 1924-1929 for quite a few different machines. They include the Caterpillar Thirty, Caterpillar Sixty, Best Thirty, Holt, Bates Steel Mule, Monarch 10 ton, and others. Most are in good condition, a few are near mint. Also have correspondances from the dealers and City customer with original signatures from some of the biggest names in dealerships in California at the time. Let me know if anyone is interested and I will send photos. Thank you,