From 1911-31, Canada issued its "Admiral" series - handsome stamps picturing George V in a naval uniform. Due to this issue's large number of formats and varieties, there are many specialists in this issue among among Canadian collectors, similar to Washington/Franklin fanatics in the U.S..
In 1924, the three low values of the set were issued imperforate. 50,000 of each of the 1c and 2c, and 100,000 of the 3c were issued - low printings for Canadian stamps. Scott '14 prices the set unused at $87.50 ($162.50 for NH) and as a set of pairs - $212.50 (397.50).
I continue to favor all better stamps of British North America as worthy of consideration. The area is very popular among collectors of both Canada and British Commonwealth, and the better items represent solid investments, as interest in stamp collecting in Canada is much stronger than it is in the U.S. .
With a population of about 31 million, Canada is one of the world's wealthiest countries, and is one of the world's top ten trading nations. GDP growth has averaged 2.2% over the past five years, which takes into account the 0% growth of 2009 due to the global financial crisis. Canada's population is expected to age significantly over the next decades. Canadians over 60 are projected to increase from 16.7% of the population in 2000 to 27.9% in 2025, and 30.5% in 2050. Consequently, in the future, many more Canadians will be spending time working on their stamp collections on cold winter days.
Those interested in becoming part of an international community of stamp collectors, dealers, and investors are encouraged to join the "Stampselectors" group at Facebook. The group hosts lively discussions concerning stamp investment and practical aspects of collecting, and provides a useful venue for those who wish to buy, sell, or trade stamps.