Whitman Expo
CAC approved and CACG encapsulated coins fared well in public sales during the month of September 2026.
Thank you to our sponsors!
Go check them out!
Obverse Description
Thai text; Royal Garuda emblem; royal seal; Bhumibol Adulyadej (Rama IX) wearing uniform
Reverse Description
Thai text; five people kneeling before Rama IX and Queen Sirikit; Queen Sirikit and Rama IX examining map; Royal Garuda emblem; Bhumibol dam (formerly Yanhee dam) on the Ping river, Tak Province
Catalog Information
GSID:
139865
Variety:
Sig 66
BNB #:
B165d
Pick #:
P92
Send Catalog Feedback
Subject: I would like to contribute catalog info to CDN for Sig 66
Body: Referring page: http://www.greysheet.com/prices/item/sig-66-b165d-139865-world-paper-money-values/gsid/139865 GSID: 139865 Title: Sig 66
Subscribe to View
Log In
View more data, info, and visualizations. Get access to retail and wholesale pricing as well as auction data.
Bank Note Value History
Sig 66
Currency
Grade Range
Sort by
Pricing
Values
Banknote Book (CPG) Values
No date Sig 16 Prefix C/1 - D/50 Thai digits in right s/n; variable weight font Intro: 07 03 1940
Worth: $6 – $100
Sig 23 Prefix D/51 - D/62 Western digits in both s/n; monoweight font Intro: 22 05 1946
Worth: $6 – $100
Diagonal red DLR oval ovpt front; horizontal red SPECIMEN No # ovpt lower left front; no sig ; all-zero s/n
No date Sig 16 Prefix K/26 - K/27 Intro: 07 03 1940
Horizontal purple SPECIMEN ovpt front; no sig ; no s/n
No date Sig 16 Prefix N/16 - N/39 Intro: 07 03 1940
Worth: $40 – $150
Sig 23 Prefix N/48 - N/55
Worth: $40 – $150
No date Sig 16 s/n T/1 20001 - T/1 40000 Intro: 07 03 1940
Worth: $800 – $3,400
Diagonal black DLR oval ovpt front; horizontal black SPECIMEN No # ovpt lower left front; all-zero s/n
No date Sig 17 Thai digits in right s/n Prefix A/1 - A/40 Intro: 24 06 1942
Worth: $30 – $450
Western digits in both s/n Prefix A/41 - C/28
Worth: $30 – $450
Sig 19 Prefix C/29 - C/32
Worth: $30 – $450
Sig 20 Prefix C/33
Worth: $30 – $450
No ovpt; no perf; all-zero s/n
No date Sig 17 Wmk: Constitution on phan (decorated tray with pedestal) Prefix N/1 - N/50 Intro: 24 05 1943
Worth: $60 – $1,200
Greysheet News
CAC Coins Bring Premiums in September 2026
10/14/2026
Andrew Taggart Joins Heritage Auctions to Lead Decorative Arts to 1900
The former Freeman's senior specialist will oversee a newly reorganized department with an expanded scope that includes American furniture and decorative arts.
10/14/2026
Trump Dollar Offered in Bags, Rolls
In early September, the U.S. Mint began selling bags and rolls of Semiquincentennial one-dollar coins.
10/12/2026
Events
Knoxville Coin and Currency Show - TN
Location: Rothchild Catering & Conference Center
Saturday, August 1, 2026
