1911-D Indian Quarter Eagle. Strong D. AU-58 (NGC). A very popular key date for the Indian quarter eagle series. An unquestioned D-mint example with smooth, mostly untoned surfaces and a crisp strike. Light rubbing and a few microscopic marks are seen under close examination on the high points (the fields) of this incuse designed coin. The D mintmark is a little weak, but easily identifiable to the naked eye, unlike many examples we have seen. NGC does not differentiate between the weak and strong D varieties, however we are confident in our attribution.