Bill:
The catalogue description for the "J & Co." RCD badge reads, "Officer's, bronze, WW1 issue. Heavy well made, Royal Canadian Dragoons, one of three folding lugs remaining, Maker Marked J & CO on the smooth back... These badges in Bronze where (sic) WW1 issue, as this badge usually in brass."
As for the vet pins, the lot description reads like both battery pins are either vet pins or sweetheart pins: "both small colored enamel pins, screw posts...".
These are both from Marway's #112 sale, and that catalogue is still online.
http://www.marway-militaria.com/auction_112.htm
There is a pic of the RCD badge, which is quite different from the usual 'balled' horn -- very antelope-ish antelope, with lots of detailing and scribed horns.
http://www.marway-militaria.com/112_5.JPG