M120710a
The initials "TTT" sandwiched between "CZECHO" and "SLOVAKIA".
The initials "TTT" are said to stand for Terra Turn Teplitz from around 1930. Currently, I am aware of two different kitchen canister sets bearing one of these marks: "Adele" and "Yvonne". Interestingly, the "Yvonne" kitchen canister set can also be found with a different mark, M160802.
M120710a
The initials "TTT" sandwiched between "CZECHO" and "SLOVAKIA".
M120710b
Circle containing the initials "TTT" above "CZECHOSLOVAKIA".
M120710c
Circle containing the initials "TTT" and "MADE IN CZECHOSLOVAKIA".