1.75" with moderately aged back paper from Baltimore Badge. Back collet has trivial hairline dent and front has barely seen pinpoint indent near the photo's center plus a narrow band of stain towards the outer edge at 1 o'clock to 7 o'clock. Pictured in front of a brick building are 16 young men with shoulder pads visible on ten of them. While their first season was in 1879, this button from 1903 was made only 7 years after the invention of the button and may possibly be the earliest Navy team photo on a button. It is the one and only example we have ever seen. Rare.