The abolition of the half dime, still circulating in the Far West, led to shortages of small change there. Congress tried to address this with the unpopular twenty-cent piece, which was struck for circulation only in 1875 and 1876 and was rejected by the public for its similarity to the quarter dollar. The Western United States was not fully supplied with small change until the Mint began striking cents there in 1908 and five-cent nickels in 1912. The Trade dollar, struck principally to compete with Mexican dollars in the Far East trade, failed to gain full acceptance in the Orient. Many were returned to (or never left) the United States. As they could be purchased at a discount, they were popular among employers, who placed them in workers' pay packets. In 1876, Congress revoked even the limited legal tender status they enjoyed; in 1878, the Mint stopped striking them except for collectors, and even that limited issue ceased after 1885. In 1887, Congress allowed a six-month window during which they could be redeemed for other currency, provided they had not been chopmarked by Asian merchants.