Question: Joel Iskowitz designed the upcoming 2016 First Spouse Gold Coin featuring a woman that was first lady during what years?

Context articles: Aurora Quezon
List of first spouses of Singapore
Dobla
Joel Iskowitz
Gold dinar
List of current United States first spouses
Dam (Indian coin)
Nancy Reagan
Florin (Aragonese coin)
Sultani

Aurora Antonia Aragón, viuda de Quezón (née Aragón y Molina; February 19, 1888 – April 28, 1949), usually known simply as Aurora Quezón, and sometimes as Aurora Aragón-Quezón, was the wife of Philippine President Manuel Luis Quezón and the First Lady of the Philippines from 1935 to 1944.
 Though she is recognized as the second First Lady of the Philippines, she was actually the first spouse of a Philippine president to be called as such, the honorific being unknown during the presidency of Emilio Aguinaldo, and thus not applied at that time to his wife Hilaria.
 Much beloved by Filipinos, Quezón was known for involvement with humanitarian activities and served as the first Chairperson of the Philippine National Red Cross.
In Singapore, the first spouse (first lady for women, first gentleman for men) is the informal but accepted title attributed to the spouse of the President of Singapore, concurrent with the president's term of office.
The dobla (plural: doblas), including "dobla castellana" (excelente), "gran dobla", "dobla de la Banda", "dobla cruzada", "dobla alfonsi" and "dobla almohade", was the name of various Iberian gold coins between the 11th and 16th centuries, ranging in value from 2-870 maravedis, depending on the year.
 The name originated as the "double maravedi" (hence ""dobla""), a term used by Castilians for the Muslim dinar, when the maravedí was re-valued as equivalent to the Muslim half-dinar, or masmudina, by Ferdinand III.
 However, years later, the "dobla" became various new coins, and at times, a "dobla" was the same as the newer coins "enrique" or "castellano" (but the "dobla castellana" became double their value in 1475).
 In general, a "dobla" was a valuable gold coin, while the "maravedi" was de-valued into silver (c. 1258) or rarely copper forms.
 In the 16th century, the dobla was replaced by the ducado, then by the escudo (in 1537) as the standard gold coin of Spain.
Joel Iskowitz (born August 15, 1946) is an American designer, book illustrator, print artist and stamp, coin and medal designer.
 From an initial interest in medical illustration, this graphic artist has branched to other fields.
 He specializes in highly realistic art resulting from extensive research to make his designs as accurate as possible.
 His philatelic (stamp) designs, he once said, "must be super accurate and well documented, for if you get so much as an animal's tuft of fur out of place on a philatelic design you will hear from someone critical of your design."
 Among his coin designs are the reverse of the 2009 Lincoln Bicentennial penny (3rd of 4: Professional Life in Illinois), 2008 Arizona State Quarter, 2009 District of Columbia Quarter, and the upcoming 2016 Nancy Reagan First Spouse Gold Coin.
 In 2011 he was inducted into the Hunter College Hall of Fame.
 A major address on his career as a designer of commemorative coins and medals, at the Museum of American Finance in October 2015, was aired on C-SPAN.
The gold dinar (Arabic: ﺩﻳﻨﺎﺭ ذهبي‎ ‎ ) is an Islamic medieval gold coin first issued in AH 77 (696–697 CE) by Caliph Abd al-Malik ibn Marwan.
 The weight of the dinar is 1 mithqal (4.25 grams).
 The word "dinar" stems from the Latin "denarius aureus" or 'gold coin'.
 The name 'dinar' is in use for Sasanid gold coins, and also for Kushan and Kidarite gold.
 It is not known how these coins were named in their day.
In the United States, the first spouse (first lady for women, first gentleman for men) is the term used to refer to the spouse of a chief executive - that is, of the spouse of the President of the United States (the First Lady of the United States and the First Gentleman of the United States) and the spouses of the governors of the 50 U.S. states and U.S. territories (Guam, Northern Mariana Islands, Puerto Rico, American Samoa, and the United States Virgin Islands) and the spouse of the mayor of the District of Columbia.
 (The spouses of many mayors are often called the "first lady" or "first gentleman" of the city as well, and the use of the terms sometimes extends even to the spouses of college presidents).
A Dam was a small Indian copper coin.
 The coin was first introduced by Sher Shah Suri during his rule of India between 1540 and 1545, along with "Mohur", the gold coin and "Rupiya" the silver coin Later on, the Mughal Emperors standardised the coin along with other silver "(Rupiya)" and gold "(Mohur)" coins in order to consolidate the monetary system across India.
Nancy Davis Reagan (born Anne Frances Robbins; July 6, 1921 – March 6, 2016) was an American film actress and the wife of Ronald Reagan, the 40th President of the United States.
 She served as the First Lady of the United States from 1981 to 1989.
The Florin was an Aragonese gold coin first minted in 1346 by order of king Don Pedro IV in imitation of the original gold coin from Florence, Italy.
 It had a weight of 3.35 g. and showed St. John the Baptist on one side and a fleur de lis on the other.
 Aragonese florins were minted in Perpignan, Barcelona, Girona, Valencia and Majorca but never in Aragon.
The sultani was an Ottoman gold coin.
 It was first minted during the reign of Mehmed II (r. 1451–1481), weighing about 3.45 grams.
 The sultani is the classic Ottoman gold coin also known generically as altın ("gold").