Thank you YZYZ!!
I managed to find it on the site QDQ (photographs of Madrid buildings/ addresses). It would seem that the address is Calle de Irún, 7 (can also be written as C/Irún,7.
I cannot make out the complete name of the store. All I can see is"Capar..." I am missing the last 3 or 4 letters. It seems to have a little statue of a firefighter on the sidewalk in front of the store.
Can anyone there confirm/phone/find out if they sell the MSA Gallet "F1" firefighting helmet that is worn in Madrid?? Or if you can find their phone number and post it here, I can call them.
Thanks in advance!
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Vamonos pa'Cadiz!