Hook of security modified, of the upper part of the closing of the boss - BT88.40-P-3200-01G

From the num. final of.chassis 005707 

MODEL 170.### ## as of 005708 

The hook of security, arranged in the upper part of the closing of the boss has been modified.

The hook of security has now a form in OR, closed (previously, in L). With it, it enlarges the security against an opening done not desired of the boss. During the trip, if the blockade freed itself.