The Kenya Butterfly Definitives are definitives that are as beautiful as many commemoratives. . I have discussed this issue in Article 28. I have also come across a correspondence featuring some of these stamps: The College Board Correspondence.

This series is the undisputed top definitive series in the level of high quality research it has received, and is one of the most exapnsive definitive series ever. I have authored several articles on this series recently. Quick links: Article 275: Selected United Kingdom Machine Definitives from Kiloware The Machin definitives have the largest number of issues and varieties of any definitive series, ever. Here I show a small selection from the 1995-2002 time range. Quick links: main page / low values (24p, 28p, 29p) / 30p / 31p / more low values (33p. 35p. 36p. 38p) / Article 286: Selected United Kingdom Machine Definitives from Kiloware These are two first class mail rate Machins: the 38p and the 41p, both from the early 2000s. / Article 291: Selected United Kingdom Machine Definitives from Kiloware Here is another installment of this ever-popular definitive series. Quick links: main page / 39p ( first page / second page ) / 50p, mostly in combined usages / mid values ( first page / second page ) / Article 299: United Kingdom Machin Definitives Part 4: Small Format High Values Here is a selection of small format high values, mostly of the 1 pound denomination. Quick links: main page / first page of 1 pound small format / second page of 1 pound small format / third page of 1 pound small format / Other small format high values

The country that first issued postage stamps continues to produce great definitive series. The U.K. Castles High Values provide the collector with one decade and counting of postal history. Despite their high face value, these stamps are easy to obtain, and a great source of postmarks. I have recently acquired kiloware for these stamps. I also have a few covers, some have been shown in article 18. Here is another article: Article 307: United Kingdom High Value Castle Definitives This installment is dedicated to the high value castles. It continues the series on articles on machin definitives used in combination with these high values. Quick links: main page / one pound castle / one and a half pound castle

The combination of high levels of usage during World War II, and equally high levels of usage during the industrial growth of the United States after the war, make the Presidential series of the most common definitive series of all time. This series, better known as "The Prexies," has an expansive postal history. I barely scratch the surface in this web site. I acquired a small group of blocks (mostly of 4) of these stamps in 2003. I also have a few covers. This issue attracts a great deal of attention, and has been studied beyond what I can possibly do by many. Some of the blocks are shown in article 13, and in Article 54: Selected United States 10 cents Presidential "Prexie" Stamps

With the introduction of this series, I hope the United States Postal Service builds this small series into a large series in the tradition of the Transportation Issue. These design are striking and beautiful. Quick links: 2c Navajo Jewelry (pane) / 4c Chippendale Chair (pane) / 5c American Toleware (pane) / 10c American Clock (pane) / Coils (1c Tiffany Lamp, 3c Coffeepot, and 5c American Toleware)