To wrap up the year, I ended with a few great purchases. There is still some thought and decision making I need to make, but right now my interests are starting to coalesce towards a few areas of collecting.
They are used WF coils, 1847-1869 used stamps and postal history, and regional/state postal history where I live.
I am sure it could specialize further, or I can end up collecting all the material above, but this month I made a few nicer purchases.
In the First Sunday Stamp and Coin Show in Dedham MA this month, I acquired a set of RH White Encyclopedia of The Colors of US Postage Stamps Vol I-IV for a very reasonable price. Maybe in the future I will look for Vol V and the gum/paper book, but for now I am happy to have the rest of the issues for initial color ID'ing. I know this book is not a 100% accurate reference material due to age, but it is certainly a useful tool for initial decision making and whether to send a stamp in for a cert.
I also got a free copy of the Armstrong WF book with the White purchase. There are out of date items in the book, but it also has a good overview of WF that is still useful to reference. There are other reference materials I plan to purchase too to better educate myself, better appreciate philatelic items, and assist in selecting a collecting area(s).

Last week were two big Rumsey sales. I participated in the auction running from 9-11 December, and initially I was going to try to get a 244 $4 Columbian (sale 126 Lot 513) but it went beyond what I thought it was worth, and instead decided to get two covers I won, Sale 127 Lots 2051 and 2052.
They are quite scarce WF perf 12 coils on cover, a 351 5c vertical coil pair and two 355 5c horizontal coil singles with certs. Looking at the senders they appear to be old time stamp dealers, but the period use appears correct with the 8c reg + 2c letter rate for the 351 pair and 10c reg + 2c letter rate for the 355 singles. I spoke with some WF collectors before and after to better understand the material, and used WF perf 12 coils really fascinate me due to their scarcity (especially on cover). We'll see what the future holds for further acquisitions and specialization!

