Vintage IWC Cal. 89 – Original 18K Gold Bracelet?

Help identifying and valuing my vintage IWC Cal. 89 with original 18K gold bracelet

Hello everyone,

I would appreciate your opinion on my vintage IWC dress watch.

Known details:

• IWC Schaffhausen
• Manual movement: Calibre 89
• Solid 18K gold case (0.750)
• Original 18K gold bracelet
• Bracelet clasp hallmarked with London import hallmarks and maker’s mark DB
• Total weight: 71 grams
• The watch is running well
• Dial appears to be original (I would appreciate your opinion)
• Movement and case numbers are available if needed.

I have attached photographs of:

• Dial
• Movement
• Inside case back
• Bracelet clasp and hallmarks

I would be grateful for your opinions on:

1. Does everything appear original?
2. Is the bracelet likely to be the original bracelet supplied with the watch?
3. Can anyone identify the bracelet maker from the DB hallmark?
4. What reference number do you believe this watch is?
5. What would be a realistic current market value?

Thank you very much for your time and expertise.

Best regards,
Piotr