British type loco, called the Thundersley. I don't know much about this. It is either a kit, or a small production run from some small maker. It may even be a Marklin for the British market.It is very well constructed of a heavier metal. The markings and paint look good also. It is an older model looking at the patina.
The markings DDD84 are on the bottom. The item "Prewar British outline steamer with a Marklin motor, very well made model" is in sale since Thursday, June 17, 2021. This item is in the category "Toys & Hobbies\Model Railroads & Trains\O Scale\Other O Scale". The seller is "dodgecomcar" and is located in Kiel, Wisconsin. This item can be shipped to United States.