The Type 66 carbine in my photo is a purpose-built carbine rather than a cut-down rifle.About Siamese crests:
Geladen's Rifle is Model 1903 (Type 45), and bears the receiver text: 'R S 121' (the 121st year of the Rama royal dynasty). Actually now, Rama X (10th) is king in Thailand.
The Carbine is Model 1923 (Type 66), and has according receiver text. Type 66 carbines might be shortened Mauser rifles (M1903), but as well new-made Arisaka-type carbines. Both have similar receiver crests.
For details, check the sticky post: siamese-thai-mauser-information
The 2 additional characters between "Type" and "66" say "47". Hence, "Type 47/66".@ geladen: with the words 'cut down', i refer to the description of Siamese Model 1923 (Type 66) in Ball's MMRotW, p. 372 in 5th ed. He states : '...many of them were cut down from the Model 1903 Rifle' . I assume your carbine has a Mauser action.
1886lebel shows in his thread, post#10 (see link above) an Arisaka-type rifle, with same (or very similar) receiver crest as yours:
- 8-bladed Chakra, to the right
- text: Type 66
- difference: your receiver text shows 2 additional letters between 'Type' and '66', which i can't identify.