Coughtrie BD10

Acquired pretty early on in my collecting stages, and another of the many NOS Coughtrie bulkheads I have, the BD10 was another alternative to the SY10. I actually believe the BD10 was made to replace the flopped PY10. This proved successful as the now more streamlined design proved much more popular. Whilst still being made, the GLS option (which this is) has been omitted, instead twin 9w PL and a few other options are listed. And yes, the opal cover really is that deep.