Consider the chronic number a government-managed retirement number for watches as Pocket Watch Serial Number Lookup. The chronic number is exceptional and just utilized for one watch by the producer. Since your serial number falls between those two numbers, you know that your watch was made in 1917 or 1918. Chronic numbers are utilized on each and every extravagance watch. Albania Andorra Anguilla Argentina Armenia Aruba Australia Austria Azerbaijan Bahamas Bahrain Bangladesh Barbados Belgium Belize Benin Bermuda Bolivia Bosnia and Herzegovina Botswana British Virgin Islands Brunei Bulgaria Burkina Faso Cabo Verde Cambodia Canada Cayman Islands Central African Republic Chile China Colombia Comoros Congo Cook Islands Costa Rica Croatia Cyprus Czech Republic Denmark Djibouti Dominica Dominican Republic Ecuador Egypt El Salvador Estonia Fiji Finland France French Guiana Gabon Georgia Germany Ghana Gibraltar Greece Greenland Guadeloupe Guatemala Guernsey Guinea Haiti Honduras Hong Kong, China Hungary Iceland Ireland Israel Italy Jamaica Japan Jersey Kazakhstan Kenya Kuwait Kyrgyzstan Laos Latvia Lebanon Libyan Arab Jamahiriya Liechtenstein Lithuania Luxembourg Macao, China Macedonia, Republic Of Malawi Malaysia Maldives Mali Malta Martinique Mauritius Mayotte Mexico Moldova, Republic of Monaco Mongolia Montenegro Montserrat Namibia Nepal Netherlands New Caledonia New Zealand Nicaragua Nigeria Norway Oman Pakistan Panama Papua New Guinea Paraguay Peru Philippines Poland Portugal Qatar Republic of Cameroon Reunion Romania Rwanda Saint Kitts And Nevis Samoa San Marino Saudi Arabia Senegal Serbia Seychelles Singapore Slovakia Slovenia South Africa South Korea Spain Sri Lanka St. How to Identify Bulova Watches Open the Back of the Watch Use a Magnifying Glass Look for Ads from the Watchs Specific Period Check the Back Case Number. Looking at the table of Waltham serial numbers (see example below), you can see that number 20,900,000 was made in 1917 and 21,800,000 was made in 1918 (marked in red in the table below).

Bulova watch case serial number lookup