I picked up this sweet little 66lb Soderfors recently. It was covered in silver paint that was covering gold paint, so, I couldn't make out the markings until I cleaned it up. It has the traditional Soderfors Crown and Shield crest, also stamped Soderfors and Sweden. It does not have Paragon or the Razor symbol stamp. The anvil does have a parting line and a handling hole under the heel. Interestingly, the reverse side has the numbers 1807 stamped in and I am curious about what this number could refer to. I don't believe it to be a date or a date code. In AIA Postman writes, "...every Swedish anvil that I have been able to identify in this country was manufactured in the 20th century or just before." I also did a google image search and found an 88lb Soderfors on WorthPoint that has the numbers 987 on the reverse side -- that anvil is identified as being made in 1905. My 66 pounder does not have a date where you would expect to find one but Postman also writes that "This company was not consistent with the appearance of their trademarks." The numbers 66 on the front are around 1" tall. The numbers 1807 on the reverse are also 1" tall, so, they are pretty prominent. Some ideas that came to mind are: simple addition counting the number of anvils one year, the code of the worker who assembled the mold, the steel configuration, the iron source, the vendor to who this anvil ships? What do you think? Anybody else have a Soderfors with numbers on the revers side? If so, what are the numbers and what is the date of your anvil -- if any date is supplied? Also if you have any clues to the date of my 66 pounder, I would be interested to learn more about it.