I am looking at a drawn scraper up for auction, photo's only, serial # tag has part rotted away, reads as follows, 2C4018 and the letter F below. Any information about what exactly the model is etc would be appreciated.

Regards, Wombat

Could that be a 21Cxxxx? DW20 and #20  11Cxxxx scraper.
I couldn't find anything with a 2C prefix.

Could it be a 62C4018 463F 21yd cable scraper?
463F 62C01003 - up
 

Thanks OM, I have had a closer look at photo with magnifier, it has another number in front of the 2, could be 5 or 6 or 8, the tag is in very poor shape.

Regards, Wombat

Caterpillar's Towed Scrapers - Contractor Magazine
Replacing the No.80 in 1955 was the “low-bowl” No.463. This was the most popular of all Caterpillars towed scrapers and was manufactured in several versions over its production life. A variant solely produced in the UK, the 463G, had a modified wider push block for easier push loading by dozer operators. This particular example is a No.463F from 1963.

www.pinterest.com/pin/570127634068232252/?d=t&mt=login
 

Have had a bit more of a dig in a book here, appears it will be a 463, just don't know what year as I have no serial number data for years of production, could be anywhere between '55 and '71, maybe 4018 would be a late one so maybe a 463 F. Should match up with a 270 D8H or D9D OK.

Thanks Fat Dan and OM.

Regards, Wombat.

Best I can come up with is the 463F started production @ 62C01003 in 1960, your 62C04018 is 3,015 from the beginning of the F series and the beginning of the 491B & 491C 24yd scraper 47Exxxx production date (shipping date) started in 1963. I don't know if the 491B replaced the 463F but it seems to be next in the scraper lineup. Hyd or cable ? book don't say.
the picture of the 1963 in my earlier post is the 463F model 62Cxxxx