I'm sure Steve Hillyer will know what make, vintage and when used. The lamp appears 12-14 minutes into this 28 minute segment of a three part series on this mine. Hope you and your family are keeping well during this crisis Steve same for all users of this message board. We are going okay down here in Australia thanks to our Prime Minister ignoring WHO advice and China's protestations when we closed our borders.
Lamp photo is here:
YouTube video here: