- Edited
Back to the topic,
The butter knives were 1984-1985 so it will not qualify for your purpose. PAR4QC 's warning of checking the shafts before putting the old golf clubs in play is very correct. Do check for rust and structure weakness or simply replace the shaft to your choice.
I have a few sets of persimmon woods and butter knives I still play in the Summer. Because not a lot of people knows how to restore refinish the old clubs around here. I had tried to refinish the persimmon woods and it was not as easy as I thought it would be and very messy. tried everything except changing the face plate. I was more worried of causing crack in the dried up persimmon than anything else. So I tried not to take out the old stuff when the condition is wet or too cold.