Alpa Alnea External Exposure Meter Alpamat Manufactured By Bewi I have no idea how this works , when what I assume is the metering button is pressed the inner dials move but whatever light source I place the meter near it always goes to the same place so ?? and I`ve just been informed by someone with way more knowledge than me that he`s not seen a fully working version of this and it`s way more common Bewi C unbranded version in decades so in his view it`s true value is in it`s rarity / collectability. A rare item , way more matching cameras than meters . Free UK P&P ( costing me £4.50 )