HP Probook 450 G5. You can find this information printed on the back of your keyboard.
HP PROBOOK 450 G6 PROBOOK 450 G7 LCD FULL SCREEN ASSEMBLY
New HP Probook 450 G6 450 G7 Silver Palmrest with UK Keyboard L45091-031
For HP Probook 450 G8 450 G9 USB Type C Socket Charging Port Replacement
HP ProBook 450 G8 455 G8 440 G8 450 G9 455 G9 445 G8 DC Power Connector M15626-0
HP ProBook 450 G6 450 G7 455 G6 UK KEYBOARD
