Engine room artificer rank clarification

[Advsmt]

Hi all,
Firstly I know almost nothing about RN ranks. I have a relative who served from 1909 to 1920 in the RN as an Engine Room Artificer ending up 2nd Class. Am I right in thinking this is, or is equivalent to being a CPO? I am interested in collecting the badges that he would have owned and the discussions I have read talk about PO/CPO not artificer badges. Also as he started his service as an artificer does that mean he would have always worn a peaked cap and therefore never have worn a ship talley? (Please excuse me if I have phrased that wrong - I was in the RAF although I did spend time with an MCU). Am I correct in thinking that there is no trade badge?

So which badges would he have worn?


Thanks for your consideration.

Bryan