I was wondering if anyone had a good sense of when the use of "Made in" was included in backmarks. I've seen quite a range of suggestions of when the "Made in" phrase began use. Many suggest that it is a 20th century indicator, others suggest after 1914, others after 1902, etc. The only date that has supporting documentation that I've seen is found on thepotteries.org which indicates the 1890 McKinley Tariff Act was amended in 1921 to include the "Made in" phrase to precede the country of origin. The site also notes that some manufacturers such as Wedgwood used the phrase as early as 1898. Any other thoughts or supporting evidence to suggest that "Made in" was used by other potteries around 1900?
I think there is much more uniformity among potteries for putting the name of the country of origin on their ware c. 1891 than for changing that to Made in England in 1921. My general rule is to think that England was in use earlier than Made in England, and Made in England is a 20th century mark.