Taiwan 1960 dollar (silver?)

Hi. I collect “modern uncirculated coin sets” like this one from Taiwan. This one says that the 1960 dollar is made of silver, but I can only find reference in the numista catalogue to this design being in Nickel Brass.  Does anyone know if a silver version was issued in 1960 and if so what grade of silver it is? Then we can perhaps get it added to the catalogue (unless it already is and I'm just not finding it?). 

The 50th anniversary of the republic was 1961. This is the 1 Dollar silver coin released then:  N#27327  The 1 dollar coin you're showing was made in 1960 and then again in 1970 on. The 10 cents coin in that set was made in 1955 and the 50 cents coin in 1954.

rsirian1

The 50th anniversary of the republic was 1961. This is the 1 Dollar silver coin released then:  N#27327  The 1 dollar coin you're showing was made in 1960 and then again in 1970 on. The 10 cents coin in that set was made in 1955 and the 50 cents coin in 1954.

Thank you. That's what I thought, looking at the catalogue. Seems that the type set issuers must have made an error then as it does say the 1960 is the silver and all sets that I've seen have the same coin in.