Welcome to Vol. 6 of the 2016 edition of the Scott Standard Postage Stamp Catalogue. The more than 9,900 value changes reflect the current market for countries of the world SAN (San Marino) through Z. Countries that received considerable attention from the Scott catalog editors this year include Singapore, Togo, Tristan da Cunha and Tunisia. Below we highlight some countries with larger value changes. -Singapore leads the way, with 2,154 value changes. A mixed bag of increases and decreases occur in the early issues. -More than 1,550 value changes in Togo reflect a downward trend for this country. The decreases far outnumber the increases in this country located in western Africa. -Values for many of the French occupation issues show general signs of weakening. - A thorough review of Tunisia yielded just north of 1,400 value changes. Moderate decreases prevail throughout, with a few increases interspersed. -A review of Ubangi-Shari resulted in 237 value changes. The first series of black overprints on Middle Congo stamps (Scott 1-22) show a mixed bag of increases and decreases. -The 32 value changes in Southern Nigeria show solid gains, both unused and used. -The former French colony of Senegal reflects many decreases, with a sprinkling of increases within the 346 changes made in the classic period through 1944. -The classic period of Southern Rhodesia exhibits significant gains, especially among the vertical pairs and horizontal pairs, imperf between. -The 41 value changes in Sweden show a mix of increases and decreases. While these comments tend to focus on those countries with larger numbers of value changes, there are changes to be found in many other countries, some of which are easy to overlook. The 98 value changes for Spain show a general weakening across the board. The 18 changes in Tobago and 28 changes in Timor reflect increases. Similarly, the 34 changes in the postage due section of Uruguay reflect upward movement. As always, we encourage you to pay special attention to the Number Additions, Deletions & Changes found on page 1713 in this volume. While you settle in with your stamp album and Scott catalog, relax and enjoy the world's greatest hobby.