Two pieces, appear to be some sort of weight. What are they for? Come in wooden box marked Federal
(http://i286.photobucket.com/albums/ll88/swervncarz/2014-08-16161952_zpsd44d521b.jpg)
(http://i286.photobucket.com/albums/ll88/swervncarz/20140816_140219_zps664c20c0.jpg) (http://i286.photobucket.com/albums/ll88/swervncarz/20140816_140244_zpsf777c21b.jpg) (http://i286.photobucket.com/albums/ll88/swervncarz/20140816_140240_zps19b58a09.jpg)
They look like they might be a 1 in. And 2 in. Gage block. Are they ground on the sides?
Federal made machinists tools.
Mike
I'd agree - standard lengths as used in inspection areas to check accuracy of tools like micrometers and vernier calipers...