Vintage Microphone Parts Mixed Lot - Unknown Brand - RCA???

• These parts came with a large lot of microphones I purchased several years ago. I do not know what model or make they are from or if they function-Untested Parts
• 4 Parts in this lot:
• 1 looks like a 90 degree adapter with contacts for some type of microphone
• 2 look like mic elements of some kind with contact points
• 1 looks like a threaded cap
• Hopefully one of the mic experts out there can identify these