thanks Christine - in fact I meant to say I thought the threading might have been used to strike the light for the candles - but forgot.
Also should have said they both had candle wax around the top, so had obviously been used for this purpose - the threading doesn't appear to be clogged with phosphorus, although they might have been cleaned. And of course they are a pair, which is more akin to how you'd find candlesticks. Maybe they were multipurpose - candlesticks and table match strikers, but I'll go with the date then - origin unknown then.
