I'm the co-author of three Third Reich collecting books with an interest in Winterhilfswerk and Tinnies.
1. Winterhilfswerk Street/House Collections & More - A Collector's Guide, 1 October 2011
2. Donation Badges, Pins & Pendants of the Third Reich, 1 November 2012
3. Third Reich Tinnie Collecting - Volume I, 1 November 2015
I have a website selling WHWs, Tinnies, and other small Third Reich collectibles at www.winterhilfswerk.com and sell on eBay as jayeffcee.