antique glass for multi pane windows . An absolute must in historic restorations. 

Modern glass just wont make the grade and reproduction old glass is a joke.
All panes will have some distortion. 
 Every pane is different . each pane may or may not have bubbles, dimples, waves, ripples, haze, light scratches , manufacturer defects
 That soft warm look at night that modern perfect glass can not achieve. 
Contact me about saving on shipping if you buy more than one