@Zeplo1 Thanks for getting in touch, thats weird that there is no care label on the inside, however I have attached a photo for the care for the the IHM-37 but the Khaki version which will be the same care guide.
If the jacket is getting a bit smelly I would try turning inside out to start with and airing out the jacket, if this doesn't help my next steps would be the following.
Ironing with a one-dot setting typically means low heat, which is important for alpaca or wool-lined items not to get damaged. It is also imperative that you use a cotton cloth to help protect the garment from direct heat exposure, so I would turn the jacket inside out and using your cotton cloth as a thin barrier I would then lightly press the iron against the jacket, I wouldn't recommend gliding the iron over the jacket. Then let the jacket cool down flat to maintain its shape and avoid any distortions in the fabric.
The signs as well going from left to right mean:
1: do not wash 
2: do not bleach 
3: do not tumble dry 
4:Max temp at 110 degree C or 230 degrees F 
5: do not dry clean 
