I’ve seen quite a lot of No. 17 Plugs over the years, but never one like this, where a ‘band’ of the thread has been machined off. This has resulted in the plug having two, separate narrow lengths of thread. The stampings are as follows:
“No 17IM . GY . SH&S . 1942”
There is also a “Pb” over a “crows foot” and an inspector’s number of “A15”.
Can anyone throw any light on this item? Depotman
“No 17IM . GY . SH&S . 1942”
There is also a “Pb” over a “crows foot” and an inspector’s number of “A15”.
Can anyone throw any light on this item? Depotman