I found this 2007 Canadian quarter without D.G. on Obv . I not sure if this is a error? Design as is the Sp Curling Quarter.
This what I was today @ Coinandcanada.com. Here the link http://www.coinsandcanada.com/forum/viewtopic.php?f=11&t=5703
Not an error, all the Olympic quarters & Paralympic quarters were 'godless' (no D.G.) issues. Some of the 2007 Wheelchair Curling quarters were issued with the Olympic Obverse rather than the Paralympic Obverse. Yours shows the Paralympic logo which is the correct or normal coin. The Olympic Obverse shows the Inukshuk logo with the 5 Olympic rings beneath it.
Interesting. In 1911 they left off DG and there was a big squawk and they had to put it back on. Here in the US they put IGWT on the edge of the President dollars and there was a big squawk because people THOUGHT it had been taken off and they had to eventually move it back onto the obverse. Here on the 2007 Canadian Olympic quarters they left off DG and this is the first I've even heard of it.
US law on coin motto has 6 volume's 1st edition 1954 5 more were passed the latest 2006. Why ask Why 1st edition no Good Or Paper shuffling ?