3300/1 indicates HLF number one at station number 33, which is Suarez, as also indicated on the side plate above the side locker. At stations with two the ID for the second HLF would be, for example, 3300/2. All Berlin full time firefighters have their station number plus two zeros for some reason?) on their helmets, a bit like the widespread practice in the US, where the helmet often has the fire company or fire station number on it.
Added by Rob Johnson on 04 April 2024.