To get the last New York Stock Exchange (NYSE) open hour timestamp in Unix milliseconds, we need to account for the NYSE trading hours and holidays. The NYSE typically operates from 9:30 AM to 4:00 PM Eastern Time (ET) Monday through Friday, but it's also closed on certain holidays. 

Here's a Python function that calculates the last NYSE open hour timestamp in Unix milliseconds:

/// python
from datetime import datetime, timedelta
import pytz
import holidays

def get_last_nyse_open_hour_timestamp():
    # Define the NYSE timezone
    eastern = pytz.timezone('US/Eastern')
    
    # Get the current date and time in NYSE timezone
    now = datetime.now(eastern)
    
    # Define NYSE trading hours
    market_open_hour = 9
    market_open_minute = 30
    market_close_hour = 16
    market_close_minute = 0
    
    # Fetch US holidays
    us_holidays = holidays.US()
    
    # Adjust the current time if the market is closed
    while True:
        if now.weekday() >= 5 or now.date() in us_holidays:  # NYSE is closed on weekends and certain holidays
            now -= timedelta(days=1)
            now = now.replace(hour=market_close_hour - 1, minute=0, second=0, microsecond=0)
        elif now.time() < datetime.time(now.replace(hour=market_open_hour, minute=market_open_minute, second=0)) or now.time() > datetime.time(now.replace(hour=market_close_hour, minute=market_close_minute, second=0)):
            now = now.replace(hour=market_close_hour - 1, minute=0, second=0, microsecond=0)
        else:
            break
    
    # Convert the datetime back to Unix milliseconds
    unix_timestamp = int(now.timestamp() * 1000)
    
    return unix_timestamp

# Example usage
print(get_last_nyse_open_hour_timestamp())
/// 

**Explanation:**
1. **Timezone Handling**: We use `pytz` to handle timezone conversion to Eastern Time.
2. **Trading Hours**: Define standard trading hours, keeping in mind holidays and weekends.
3. **Holidays**: Use the `holidays` library to check if today is a US holiday when the market is closed.
4. **Timestamp Calculation**: Adjust the datetime object as necessary, then convert it back to Unix milliseconds.

**Dependencies**:
- You’ll need to install the `pytz` and `holidays` libraries:
  /// shell
  pip install pytz holidays
  /// 

This function ensures that you always get the last NYSE open hour timestamp considering weekends, holidays, and trading hours.